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 0x5a2f99abe80a32ff07a2666f40533923d8c4eea42efc9c5604d899ada28274b6. 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/7969db85-f8b8-4cf0-bdf1-999226985072.json and https://artists.proofprofile.net/proofs/artist/7969db85-f8b8-4cf0-bdf1-999226985072.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 0xbdcc4ecc01758fb93883b86acf38aaf3b6bd025bd7257284a058cc5024f9a1a3. 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/DGA052349287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553bc7dc0eae42801e48f02820f2b92709e186d4e4fc1031591d2eb6a18dd1a4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TR6792201776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98ac1a6f7d78038664311494c8e9296a210dfbe8ca2a18bb91499bbdd9edca2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR6791800856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e7351dab2c377d2babe460362a339e8dd8ae041202aab880fbf254f2216cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR6791800871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c538333460780c2d643d097c231e15d3e853525dda8c1d0135707f39bca894. 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/TR6791800877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd5314a0ef2c95f95ef44657c69a7618a62ea487b13c40e48f44a0d44f131a. 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/TR7791000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbb4bf6d70cc5ab3e295599a5259cd4aa950d66f3d9425727791a3a5ffb0eee. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TR7791000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e75041ac53a3243d3820a8abac19279b1b4a9ba439f6a96764fb41be62b3c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR7791000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21082d9bd27d902bf076234998e4c8e9177524d87ea2f21d684d61faabc7efef. 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/TR6791000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bcd92bcbe1a8e2249ef51dcda1c37488df50a425ec9d6b8ed171fbc7062a60. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TR6791000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4b6764ffdf86bddc013482240e495572f9966e06c8ccc677ddbf9c0b2ab326. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TR6791000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57051727f9d9ff0880f2a99ac5b159601d3881a7cbd46195d45559397cdfc57b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TR6791000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d81faecabcd35397c3443261e05c259d2202deccc9e8a0f5e3685e266a37146. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TR6791000190.
Ladies in Lavender - From "Ladies in Lavender"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76f39f71578e575729aba6f9fc537451dead2171edc1c42cae04f1a769ae6c0. 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/TR6791000205.
The Kiss - From "The Last of the Mohicans"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a38df40941f2c8c4ac0c6c5dc075014451fe6b8aaa90eec0653985b1ab2041. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TR6791000188.
Schindler's List - From "Schindler's List"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e9f7eaea6272206e7b24bada6a9b07c23aef01de914234a692f7445f57a54. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TR6791000191.
Waltz 2 from Jazz Suite - From "Eyes Wide Shut"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeef8d30075045efceac3c34b7b5d9d485522cb85e646efcc986c813725a1c0. 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/TR6791000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa558475d32bf2930b1102350fd2f1531de2d5d7cf477cd8f4185fb007f15e3f2. 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/TR6791000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b7e7b82fec8306a9758a632f4be043b6bcc1d3fc702deefba0dfa931eccba. 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/TR6791000193.
La vita è bella - From "Life is Beautiful"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df11470da94cba99e76a47c5cbac5cafb6feedf556bcfe36235bed5f512acc8. 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/TR6791000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55675606d8da8a763f0a45c4290c8dc5007e74f7388320c91e284d1bb0c9ae95. 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/TR6791000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc07b757937b40aebab23d07d1ebd47a4e97d84cb935dbe14ca85834d3cf1c0f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TR6791000018.