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 0x4da14377fe31a1ab294b5bcc72d8fd863e2990a5a5f37d1640bdfa03197d8983. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5f4ee28-1295-4ff3-9056-121c71792893.json and https://artists.proofprofile.net/proofs/artist/d5f4ee28-1295-4ff3-9056-121c71792893.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 0x511dedada565ce874672d9e7a264c59a81c16f470ccefc4224f07ade6d4e1299. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6540854160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613d85cf9e14d0631f86c4ed28546d2a5353359341a2723c684eb0ef09da29c7. 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/CH6540854169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de43b0ff1e44c84be7715bf059b9571c8522ecdc995deeec375c9d9cc5d71a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/CH6540854163.
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 0xeae8e1ba2ef0f45dfdc4bb2f741fbf55472bdd4d7ed8c2c6dc496df92221650f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH6540854158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93981c9845be7afea52e7b2880b9a31439ff64812451920c7851bd8bb925ca23. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CH6540854159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70af1f234bdcd1da9f467e201cd44e884d25e3486fd9da1d544e62e83b1de1f4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6540854162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb588c97b80aa284682e7d0b943a91b5c4573dc191375e2cb8a072a77495390a4. 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/CH6540854164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d5438cb7e58f35b3e2283976683ba30448151d134f1e36ac89af686577b3a. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/CH6540854170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fc376f1da250f59073b14b6c149885df82e45a4094b91482d06ca7014fe29e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6540854174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78673161a9004e05d261ab0a92e4a2961b2594eb433108c2b83f0bca69cfc934. 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/CH6540866442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eeced5405ac786cc104ca497ad0fcdccd76f71057f225d45aefc825b1c496e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6540866432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc298bc5cf81694282f5623df44bd32b2263a4b1b0532d109bf23d1b163767f3f. 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/CH6540841858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1486232e60a308cca76d1cce197ec09db0d5aba0a8ed0782064b99bf43ce5b. 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/CH6540841864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632fd080eefcace2c95413b51692a6ea9eeff15c741c243c37fc126c4a02afa7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6540841871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109e074c7228d414629c9c9d1a9f388fc78a8cc5c26599f8f5fa4c61a6b9638. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6540841874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd5d37e9e8bc79152baf7d3c245a9466810989cfeea72b50afff91498f7269. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6540841875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c073b5e3861245fd66408c64c5a4c89fa04dfd113b52594b01ddb463beb93. 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/CH6540853885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c49be3e9f171dee59e5b51784e9548ce43e08c2050cfcb7691232a7cdd7c8a. 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/CH6540853888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb620c99ac0f7d8a413d16ec770045e662edc6fa0f68645615b4805b2f578cf8e. 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/CH6540853896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27274a2254678f6ce59c03c336a5823674cf6ae79a9b0d334a53f309fa592c43. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6540853881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682eb51c9f6ec42ecfb5b10cda7e2882618819d5fbcf315fb821cc8672d27b96. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CH6540853882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ebab57c3c1d5aba0d693a0899a4b348411260af92a8735f4ea604ba0281b2d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6540853893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb55ecce11be91071d16f894dca6f96d48d2e1cfc1eee1d6a62da6324397a04. 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/CH6540856052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57739197ff18628f8529794ccb37f807b595bc62bb8249198603a68f0a7dc89c. 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/CH6540856058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c1d1cf22d62bb015b262b828af726032121fa0c4ad9d7d2fdccecce8d2951c. 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/CH6540839396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71330a625914be5492503abfc4096203b9c7ac7b1e11298d47c2e0b2569fe8b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6540839397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad341af69b516f3146c155cb4bf0081d48738434140597b32650dae8811c57. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6540839393.