1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7c0aa699ac15aee93cda6a33d8686836121f884372bce5d554b9088a5eeb5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/defb2229-c5e6-451d-b705-b6cb28714645.json and https://artists.proofprofile.net/proofs/artist/defb2229-c5e6-451d-b705-b6cb28714645.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa48c1b7a6c1849e9c467dc896e9dcc31496f25bd0223c9cc504c587872c4ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646502.
Rei Zumbi dos Palmares: Tim, Tim Lá Vai Viola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9634765194ecb4081d4f7886730a232bd66740d2135c6df7214cbfc0820cc5d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646506.
Rei Zumbi dos Palmares: Saia do Mar, Marinheiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc048090fe28c17f4ce4acee85e91f3d00c77f1c05af4b3046595fb134779e543. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f6d3136a83900aef3e3e28c9e7d8beb232aa80bbbe0b6c8afab70080f1382d. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ca93a7a6ed30ecd6f0cbc1b8463a74147f9db65b368109d309b52b7860b09. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997102bda3e33cac03d203690b37f8fa2a512e9085fa7cc578487aa0d3dc8a0c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646510.
História do Mestre Pastinha: Gunga é Meu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa38578866bf15a024d53a46c09e1e359867f85ffb8fe4d500263dbbbaa8826. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646511.
História do Mestre Pastinha: Jogo de Dentro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a24bfae4c48fb298316899276434b4fe54633fe9746aea4ffaf36f7e6ff0eb8. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979f9ef86f358742b1fc40e26f4f6df9e1ba1331b9f9e67ead0ffbec8e25426. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50110e57215adaee34ea91623b60487d7e146b463e207f5a9fb5c92abc8c71a3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646514.
Lê Maior É Deus: Valha-me Deus Senhor São Bento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf716d88b823efd5a2edb25344b8b537d8fd97535e92c750e5e1e8376ec28099. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8f7aa04ad41adb4359f7efff0e5e0492e9ebc3c16327f605cc72800ad6f8d9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507198d84939e53932b9ca831c77a210cdb1c33bf636aadcc3128826fb334027. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34b39af5d9c81f63b9848c9d0eba8c441e49e6b137d831535634d84d974cd74. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515adfad286683b00e70e99b312681f244620f81e5d3b48e68d0f986206c278a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee88018cb0c3e054bcc4300636a7f977bc6f472427ddee2d74f2f66cd599954. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646520.
Retrato de Salvador: A Manteiga Derramou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea167ff358c7945411696eeff9eaeab796ac2b636bfe21172bf3f59c3f811647. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ac38c25695a0af280e5f7b98cd1515a5eb8dfe6c199772ae6d9ec8ba2bddf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc2b57c13111769a62b0ab3bc7f5a6291ffcbe1c6c69b8056900df425816d0. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b45df642334edc17a945b9bf719f784e95149c23db671ab9e31bd495e9a1869. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dae1b8084d134d067c7f830ccb70c6e7bfa5e9ae6e564ee8a10f3ff5a2e040. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6b79c193eda14e5a930b7de532b515d84ddc11059a8f30f8da1e08416c60e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61253af87a9b8b6d772fb04cb3072f7b725d56c2157e85b729f88d56fa635771. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccae09a5208958127972e1df2917075c6c7763d0d02b3ee7340f857b5af3f6e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899cc335e384cdc64c64ddceed0346da697dbbeb7db9f914de3bbd78f4d698a2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb425ce7b30e3623d13538e3e849b12b59be38d48ccb782ff1def0e0647bf9d94. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b78fab723cd42d7e8ce548c40c53746f132324303967a948758d6903d4b207. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18da2ce720a9fdc688e4b877cedf1d9ba1e5da0db5201a2678693dc9d0b1c56. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac3737547c45e7e8b75cb5df86128ec94755275a98cc7baf5d5e1531ceab709. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d936d9c73d1ccaef16645d5c16201e40d5455476f82c2bacb2bca285707603. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaec559463284b5cb1169dd029bde8465768cdf1aed3b66836c9720d761cf77. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b747117f17c5a2e70c98c9a9f043a65b3a0eb997bc87e125dc9cddcd08a9cf9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8ebff6e96a65744e050e1ea2458e3478fde296375dd25848ac5555dc8e55f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600dc9280f97c859ddc8c6e5ecc75f588eff3bf1d7226c9eea5fdf53d42612db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF19646539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13612aac2f6b9b68692d9f985cac42f60ee4ba00ed108c19577f6261cf1d02f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF10348802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f284ca627c1563882d495a7f81c3739c4e1b90f31f7ff9e6d7f248bb0e4c6a. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF10348803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243da8486ec2568238d7e123963681f441d521ef0e3f65232543d42f21b7a540. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF10348806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88c9c9e5ff3ffb0919e6987e8fb1a13552270a3afaaee9a62c834fe848cd609. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF10348807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6d2805b74afc84255c6efe4058239b362e4f4c7e8330a99fb7b45b5e6bff8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSF10348808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b8d1d265bfb7539151dd576080d0b605e76deb1f949056e0eecfedb76a14c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA130005868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22f989872c4d7d9d8ee77e01cfb3af0479288b6e6cc64d60c0c79c40745970f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA130005847.