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 0x8dab811c0dfbb617e7b7e8181f497ae2851eb1f9e787ca7d769add3606ca6021. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/770f8500-6157-47b3-b309-9868f427ed25.json and https://artists.proofprofile.net/proofs/artist/770f8500-6157-47b3-b309-9868f427ed25.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 0x4180338ef7c733e87d2c0e590f88960445fa77b350bdec7a944e7bcfe258b0ea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ING212498758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cdf581f6299fe6ff095950952fcac9fdbb5ccc1acbe5fda78097a5eba52b01. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ING212498765.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70871c05c05a84b042d14aba4078264210a8c3241581a089d79d137b439c6ee5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ING212408202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702502fa1ef79fda6887812f85bdae9b54a0906bbbbf2e506ba66eb5b7858cb6. 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/ING212411559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fba42a012b4c5216571d5d3f72c8aad4614514d05e31481f330e7279c11c88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR59R2522206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7afcdc36473afff6748572902890f83787e98b6eb0dbd6f82d569e07c6e5d26. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR59R2526027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c07ba8d66e07e5fa7a290443e7bcc942dd7f1292e82e491e5527fe2b66271a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INL412502093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982bd145350dcf86b973adbf22a4f17d36111f35f33faef3aeef13c417cb91f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INL412502216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b81a2ca3c074361625d4ea5420625792e9d62138016674ca2cfb504907afc9. 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/ING212525510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aa6a540ac66c5909ee0360e61a1a2c081aafa7c3ea7566bde6a2d2f1adf4a5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ING212526661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b5ccf9c88d04c7b43eda63a035cb19bfac1f3697887905fecb1561d49a3e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ING212527127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aab8e744aed773e553bbd8023bb5da8f5a6b1cdb1cae2b6269295ea801cf87. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ING212527553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f35232d4ed646e363e8c963a3896939f8395cf275b04af979def72da3eb54a. 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/ING212527862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81bf1d31a947ecf5f391b90ce0fe5e1a72ce8840bf540e68d48e4ab138be019. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/INL412502934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179884e1c908c963c06b03f9bdf53cad602ed36e927c445ae5fabcbcc5dade7e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/ING212528353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023f73c3d6e6eea73a99a739a0cc81d36be4dc764c40f77407ad6d53ddc9d54. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/INL412502944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6695a98e0704ee5b0f4815d16710d781cede7fca6ff2f2a02d49ea962c39c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ING212529189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492f02e6e119c4cfa657e38e5b9f59d5ad30f19235590a036558932df59c817a. 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/FRX762517221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7f70f4c2b76e38ad7048347670adc010b8de0c656c8692ef4a3b4acefd753. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX762564254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea8ceee5f28fceb6f587a4b2065ec0f129044a453a46ce438c714dd5c8ce551. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/INN242534122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031a36a0f5fc630ac65bbacd07721eb8a1c57bb5533a0db09442c7e457af56c. 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/INB1Q2503948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bcaa41cb6d12770dffa4e95ab7dad3e59288db346dab73aad6a49391006905. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/ING212533694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5daecc76bdb77af5b0d4eeb5e388933284361f3878c8b8bed3aaad46c38f4dc. 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/INL412504318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297d2057630909efd481818b52b7e7d73e9778845513b6ba35b94c1a0748db8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ING212535568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca29a5c1fd5761c55ccda95e41e68f1dd8decf2704535a4cb17dc5cc08cc181e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ING212535750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937a73549a348f1d278b98353d54332c04b0e40654d24d92e502095df5001d7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/INN242541215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b52c03aab21792b3fc8ae8c3ca1fa0941743fc1d9d3a914268d756eb433714. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ING212535925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ea9143609087fe9b5b7ae5a46620fc991216dba07daa306d1e399d6d0054d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ING212536229.