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 0xc3a7d7b730ecde0ae01de3f0f8ec10566bd6543929d535ca4f6c9600d14b8a57. 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/7b9d5478-87a1-419a-bb9a-884dd03023ff.json and https://artists.proofprofile.net/proofs/artist/7b9d5478-87a1-419a-bb9a-884dd03023ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tri Boje Zvuka (Live at RTS Studio 8, 2015)
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 0x534b4b8adaa3b247672edd7021495ffbf8eb9d1c4583db93c486114d3ef8f1e3. 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/HRA101507046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503552691dd546e4796b9590e7004fa67fc942d3898afe475031516d15b10bb. 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/HRA101507048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7b0d7b85ec9ab224d1baeee78f5ba7d0e3adc32bd0549c09c5159c6b57ea88. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/HRA101507051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0a54cc8594d3dce33a73204379872fd8acbb3360c24b492022344edfd8a69. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/HRA101507052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68896226280d75b845af7dabde592ae09f90f116300c66c45c7eb7512ae1498. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/HRA2U1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d03e8cbf253db83b0a49e009c823501e7ebef9dff4b9ab08cc30ce6022fb9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HRA2U1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe703e6e26c9bbc1281ff9116d926f66106922c1b0b0dd00bd883da2da66c5f89. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/HRA2U1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cde2d767e0a4eee9758fe9d4fe8d401ab23ab57dbae623c60461275dbffed2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HRA2U1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633ed5b9922f5c25b3424b0d46d1c03021c8c0974fae328cd1762b01bb506bbe. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/HRA2U1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75769bbc3b39135d3d537cdbdd7fb9ba4679c6a9093a0f25f948937e1145502a. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/HRA2U1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63efe2fa21bdc502bf51e409a2fa18732441242b0e12354f433e631445e3f99e. 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/HRA2U1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b7549f34705023f1d17c115ab5511034e6ce81b286bd6794b54a303f1f931d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/HRA2U1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8ea39c2797402d712dfb50c85d621cd52deace70b3c70ae6699ce0c9ba411. 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/HRA2U1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44277981bdf78a120f8ab01acd210c82769dc87702572bd5f4678863a0292392. 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/HRA2U1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a74723ddfbcb6aac5769343ba984a254ea35ce5747688ebf62551d90e7bb19. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HRA2U1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97a739ffc4d5a272c493f9fd139c6d3a6c79aa4b0eb677f5708d90b4e4f6243. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/HRA2U1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce67f49a2306a0148b345fb357943b6220185552a60761439e086db477e93b1. 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/HRA2U1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f433e321d6952613aa783c64845c63fac788e6870e3c664c26454d64f9b4857. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/HRA2U1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9cb1d97c2167d9009369cd4c4fe0227339693238b58186ce998d986607a89. 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/HRA2U1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b7b6ba57ebfb6ad6d6716486bc1b7f7f14809f1113960322b9936f2e4b1c95. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/HRA2U1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393268a268dceb87289cd4810817fcfc26beaa7fe04da04cff3f3019b3b1f98e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HRA2U2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65bf0347f1578edd79c08442d42a842682c780a2a1e01211d4d2dfab13aea9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HRA2U2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde06994710dffe35b82169fa17454d4c6c945a6a71c7793147a33a9c80737266. 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/TCAFX2179308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d61b49fec5af7148362aa28d8d7862050113f9555236071431d30b4192194. 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/TCAFZ2124955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cdd335d9344bfc752f8f4e86498324da6fc279e9dab58ec89df5a68abe5a95. 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/RSA042300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee988b1c53818dcd0dbc1d1c814679931dfb3871efd46e723b8fe4c7a240b5c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DGA0M2300989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834512d268689390fbf82e8e1d4a497cc2ba13d13291fe1b5b03fbd705d45bf6. 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/FR59R2499578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486aba9aaac838304f0ea828a3bf89ae51ce22493c76f31769d0c89d0434f784. 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/FR59R2494185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bd4e46962024faf262bf7a8f8eb640708f3d4a3c515233cd198e586e18a65. 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/HRA042500748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d627a898298c26b407bca5406b4a679a4ae5d49d4d41aebbd486f7e75c5c790. 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/HRA042500749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d08085306c0e4795f368699c3994a4b9c9a383a58d09f7e1ffad17b2d12d6c. 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/HRA042500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f892e363af9f878f450e1df541d117a8e06e683cd3ec41465d4980967f51d32. 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/HRA042500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf314b781435218b5bb8c7a506b4f6a5d43f9aada8d099a6fc7f0c3e6fa2b588. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HRA042500752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdf34975245e8099ce62c10c657e6693f223b2c359902c917b300ba1815299. 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/HRA042500753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b2502f677c54785d2ebd3dab8a6e0790734144e64a995de90241cb30e7ae6e. 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/HRA042500754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd5ccc92cf8b7aef8fe7803b4ecf9ac03be49cd074b9eca39a1a5e513533582. 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/HRA042500755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276a9b8e115f48224fe5c68deedcc75007552478660ecfbf464bb904c497f81. 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/HRA042500756.