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 0x09eba8c649b227863e2b8c00a627ef111202b56cca24812169ec91f553bafbf0. 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/93423ef0-060f-48b7-b0fa-fef9a8763b4f.json and https://artists.proofprofile.net/proofs/artist/93423ef0-060f-48b7-b0fa-fef9a8763b4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Favourite Shirts (Boy Meets Girl) [Live from Top Of The Pops, 1981]
Fantastic Day (Live from Top Of The Pops, 1982)
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 0xf907a0263cf69965aabdaa0009d0aab1b6a628a489918573b7aec8d4eef16bf0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GB1108200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6e1b317d19b8fa83c755fadf26c3ca6252b7430e8f5ebcab295a7c88c7b9f. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GBARK8200025.
Kingsize (You're My Little Steam Whistle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3141b3b8e02cf4c563117e3f74972226a6df339a6eacf35b29c880950a0ee7a. 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/GBARK8200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2440fba3ca5910a7ccd0614785404d8a3748ade7e70deda389ff0760f4d93. 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/GBARK8200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7efee21f30a31dce916affa7f97cca489beb6310a1c0f4ee22212ebe5ca7b31. 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/GBARK8200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde36f0933406e8ed9ae999ad881e33d19bc6279139250bde720a1ee145ad0cfa. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBARK8200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8314932e5ffd96e3bc957e06c9481f2d21843d10d0a0821e8a107d95d43283. 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/GBARK8200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e41ce2dce4a79ed820a30723964c8899d839f39d64d9071577fd29f9461aa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBARK8200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71807f96c03e449b61610d21ae1def5856f77a0d84bb79a6166435f41bd51a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/GBARK8200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbddf19efdb7ea0c9abf970a53ded6220adf78339720c39cc63a20a32a268f75. 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/GBARK8200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e82f681b027403c57a544885d87c2b19bd5dce65271c2226aed7926ddb4a51e. 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/GBARK8200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f911388d3fe6c76e38df763a30ca5bad97e54b96494975964bda946eca4c81. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBARK8200033.
Favourite Shirts (Boy Meets Girl) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ec89296054d282fb0f186e54151145573e1a3db112f85c73dde90a0c1bc909. 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/GBARK1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6e1b317d19b8fa83c755fadf26c3ca6252b7430e8f5ebcab295a7c88c7b9f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBARK8200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa3f59210760c8a557171a95021d55d1554729e53447931db8df0e31fa57d7. 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/GBARK8200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44d993a02c1350edeaf0322182411ca632e587874d0f579e8d281e199a33930. 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/GBARK1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3141b3b8e02cf4c563117e3f74972226a6df339a6eacf35b29c880950a0ee7a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBARK8200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9e1805b346f44b9d60fb8297f0fc6ef75c80bfa64cb3c837a584b698281701. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBARK1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2440fba3ca5910a7ccd0614785404d8a3748ade7e70deda389ff0760f4d93. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBARK8200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7efee21f30a31dce916affa7f97cca489beb6310a1c0f4ee22212ebe5ca7b31. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBARK8200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867cc8b5dd66ccd68abb72a8f296065cda60cf9d1b3b0d2388158c1abad92059. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBARK1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde36f0933406e8ed9ae999ad881e33d19bc6279139250bde720a1ee145ad0cfa. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBARK8200003.
Favourite Shirts (Boy Meets Girl) - 12" Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4e57e7e17a71800e3a5a0ea62f319fe20cf02adc301258947f17170dee8bbd. 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/GBARK8200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8314932e5ffd96e3bc957e06c9481f2d21843d10d0a0821e8a107d95d43283. 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/GBARK8200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e41ce2dce4a79ed820a30723964c8899d839f39d64d9071577fd29f9461aa. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBARK8200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167728fb73ed2d2c78f4de04c7b9b136b56ad53b1e739c39b2326bac7f51e0ee. 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/GBARK8200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4e57e7e17a71800e3a5a0ea62f319fe20cf02adc301258947f17170dee8bbd. 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/GBARK8200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b408e0380fa26638089e130ec58b6fb6ee7a66372e0faf6580e46695ef63a94. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBARK8200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b151ec0d7c306ce6440289293376347b9d8681b259263991a2b37bb09f143f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBARK8200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b151ec0d7c306ce6440289293376347b9d8681b259263991a2b37bb09f143f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBARK8200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c24eb2680510aedf6b14902c229bd826c0167423ad9beb89bd26a7ba3308bc. 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/GBARK8200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48338a4db2604d1498127e1ff5c664c3cbd5856728bff2af290faf76f1125fd. 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/USBT21612456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c24eb2680510aedf6b14902c229bd826c0167423ad9beb89bd26a7ba3308bc. 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/GBARK8200001.