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 0xebd73350b5deea4ab8771648f216aeb79344250e986fb5cc52712476d9b2da15. 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/e7864e56-c427-4fa8-9a18-1e3eacac49c6.json and https://artists.proofprofile.net/proofs/artist/e7864e56-c427-4fa8-9a18-1e3eacac49c6.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 0x823def295c11fa45c672345de55f568f0525c635538858173fd9436597ccfa75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU6964624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649057c5206bd467271d9da2860e04daa507393d9c1350e41a4d07f50d7ac114. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBSMU6964625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace9147ce45499eaadf506cd35aac7668a517a1f6d8d7b3a36b48f332b1b028d. 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/GBSMU6964626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7584807ea31dbb9f4a757d3ab2ea7b4955b4b22c9c9fec91aafab589381efb11. 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/GBSMU6964627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea12e4ee3a173b730cd1df481a6a7ac980f012fc5cffe51060697374489483a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:13Z), 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/GBSMU6964628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccfc0beabe3c681f7d8fa2cc02c15f9c42e5c63cdf2178d73e71748fea41ff1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBSMU6964629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aba2166476b92077da4fe99cf7d2a8554e28f3d78c1986f4dc24c911052546. 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/GBSMU6964630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca519e47a567b9875e12a13cc43eac727f3eef93ff434dbecf331efcc97820a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBSMU6964631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c6c73fe013e853f4dfb9a5e5c2e10f06582f2915b6e4473e6cbdcdadd0981f. 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/GBSMU6964632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f50df9c8e5167fa998a872e2edcc1abc2239c72a46c963af0ed9e97f18598e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBSMU6964634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca68ad8139a684ea25e597300c0948b288cc1edc3f612d5a3dbf38eeb1c3ae23. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:13Z), 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/GBSMU6964636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5a5efbbdb928422fe61a3ea92cfb315f3c69c77f487354b8b8621716f0bca. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU6964684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f48af7fd71554c1e9e1d5f8f77cb404532b7a68cf88202b3d269f65764577a. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GBSMU6964685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d35f291045601ba7e406814cde8a6deea103d5d4a07ba9405a0561817584e5e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU6964686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ca55839a897c0d0bbb72c0181ef15f324e3f6a2a3d0d117c05f08a11189cf. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBSMU6964687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70024ad985208da28c13bc7dbe4856c6ef2d5bcdfdc368952aa03a24c18399df. 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/GBSMU6964688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab2b47335a578b1d5b9e3604cb7e6ec7195bb662db1d49f76b2c53ee15bb76a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBSMU6964689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee456a02da087b32d07254ca61d1d4f5a7ed878b5917a50283eeeb1325ced18. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBSMU6964690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13155128e4c28ffd223096824c565307b60056c391f84be2c1b46e00a59b905. 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/GBSMU6964691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421f93355353dfd2443e6542d57d08b3acf356b659bc9e3fe254b6249b9adaa. 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/GBSMU6964692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f08407259e7e2b37afc9eb38dbd377c8b01d6113d73c4c1171b86e4013a75. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU6964693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa8624ed1ccb6ed5cba3003aa97c03ab8c33846df82ca06983e2237d9d8e58. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:56Z), 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/GBSMU6964695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20127e86277f38773c9f579640c65912b227cf1f1152d9f32991a46362bee81c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU6964697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea7ad945bfc11a9314b5a1bd62fca73f745037cc341998f7d7daadf63fd94f. 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/GBSMU6964698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e1b1d0b799ca483915beb0e52b7276e801484bf5fc307bbba3e3d5e2870814. 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/GBSMU6964725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdcc3dd2dd2008bd06e0f4f73901e57009d4ee179a81da0e8f765f7c8007e4b. 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/GBSMU6964726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d532fe5048126531207e8674628fc33b6480b99a221734c4027780a373da427. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU6964727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d882b37679f10bc695fe687bc75aac2b98ff755056d151828cee83d1c9bb250. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBSMU6964728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2859aae2d3d6cf28a619a0b8c43a95c2a66e62d90dda48eb7cc71a9e5e38ce. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU6964730.