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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b7884b280e1374e74da1fbec442e382a4b4986dc3c5d3658eae08677236341. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f60341-6146-4264-a72c-fe35bee10cdf.json and https://artists.proofprofile.net/proofs/artist/50f60341-6146-4264-a72c-fe35bee10cdf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c16a885b76a7316845444d681b72dc47c6e68b1a0a86a49b46f2070101c11. 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/DKBV70403604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca4cab2508c4c8cebcb6a54e9696b84048f1a1a37aa0da3a6a8ae7ce260af4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKBV70403608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e047571e26831c07e3f4d3a593225f51601b6f7a5ab49073f30c4d50ca5d63. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DKBV70403606.
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 0xd1e449d09d054aa7b446d99538caf0ad8315e92f4f4ea07f7a53d11cb7cbef0b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DK8CA2200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb52706ab460d2d7b8964a62c762a494ab4a706426c96fcc66bb8c811a6e7555. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DK8CA2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee86b55e4815546f15e8ed32943d539ed6df80eee7417d6df606dde58aa5ab. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DK8CA2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3efc80e1222775c380cf8379b2f0fefb789e66e3c151061d50c9ef24b736313. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DK8CA2200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f92aba6cf9eb54f9c88b8ff8df0b12161418ae67d7c9573c7703daeb41048. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DK8CA2200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548f32f811f25f37399cc0c84351e27c729af4f59eff49f6565d4e78f892284. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DK8CA2200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6439ad47416a35f326a30057f295f583335b1d8b447b52dfd6417ec7ec2385. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DK8CA1300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bba5952de538ce4082c315bdb35fa4d65e009f38f63b9369ce78094bcc189. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DK8CA1300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d300e24ca50dc4df55798f1448805e44fe5c36abacdbf26994a0391deddec. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DK8CA1300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88aa12443d7f6bac5cba7a036b38234405c0b646c40defd705cd6be19fa89e. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DK8CA1300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1461dcdc67d14682b484443a0c23dc62a3341d2a3152844ec42514ec13232e7d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DK8CA1300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d696cee00210ad9bbfb7d914494658cf5fcb85544bed8cf797bc66a763a74. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DK8CA1300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee601a9230489118a8e1087f2f2256adf92dd4affb753f0a880587458fac00c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DK8CA1300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5335ab15cc02ed64371205c9593edb8fba9f854a8744f537c040d6caa580b9f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKBV70604301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9afc8748bcdd123f0db955d8349cc1281b225e37656baf9832b5062b8c66fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKBV70604312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fe35f290dc85acc055c268eea7a2d3c36e56479f219af83d6b8878ebc136d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKBV70604313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46263ec6fe2f46963714128b52d0ddcef18705738d610ec11af72aea6cdcca57. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK8CA2100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3fa9d00d1b496ff9e52d7d0b68760a6e56349fb246e18ac111d7ea36cc57b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DK8CA2101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600d0d4636ecfb5b3e426af4f358bd5e4a095683b45fe88bd53ce5beaf1348d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DK8CA2101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf4f28e6bd7f07afa440e467c150439f05db30d64aa02daac16e9896b099f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DK8CA2101801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858d1cafa1951c027b116f5d617185862aa816d1adc9111482dc39feae1f1857. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKABA1300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcd76467109188905bf1d75e7cc006e0399f1f10e438854f286d569c43ed68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKABA1300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17606d0b5cdb78d762ca660a21fb9f37f379786e35511386fcff310bc501885. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKABA1300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dc624497f505fb73d5206bbc40a4283d3f764768ef63acfd3f20d080d81261. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKABA1300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0959a345b3f4fd24d8818a50cab8823f02d2415c990d51e893249b5bc5958594. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKABA1300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea43ede252def5505f870d042e18a21dc3534c6d91f992184ac14c7fe05b63fa. 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/DKABA1300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a62f7d4832e4c99b47b69a71e2016ac02c6852643de6bb3575ff8a7252bed. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKABA1300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9c64b40aa5f3ea2554cc93557e663b869d627649e8dd72346ab23e827ce07f. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DKABA1300264.