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 0x60cd08e78f32de55e6b173aff2b95e1a787cdbc60ac92bebe0eb419732178a55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a81ea566-2e5f-4433-a726-32cc57ff84be.json and https://artists.proofprofile.net/proofs/artist/a81ea566-2e5f-4433-a726-32cc57ff84be.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 0xa6cab07c8240d1285da6e8a5cf3d18bda5722af2b4b53689791b1bcb5cc90cb8. 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/US83Z2465271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a41f3146567b940522b2a62ffd68c10b7eea0e3b5ac93875294787dd8f161. 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/US83Z2465272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616cdad1f85e9e88075b02666479645a4ba719bfc9e754e4773f81f6006349f6. 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/US83Z2417516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24211d9466ecc2058acb1f5860f7c471ed932d862f153334381cd587eec7a3bc. 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/US83Z2420711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bec12ccfd76e47bddd193974c8d39802d350a06be3c5d3af9aaa7e5de7066d. 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/US83Z2420712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98186036b780e97186414d9b49d91436815a5365da0cd6488f4c7051af8b87f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:10:01Z), 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/US83Z2420709.
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 0x9cb8611fedd9d2db3900331fd8e2f7e61a3b8a39914a9d39bf01b3453cf79a63. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US83Z2420710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a664be30fac53c8166c6b248cdb77513e4b54991b67406ee0ba875b73183da. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:25Z), 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/GBKQU2515213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f51ae6351eae7aa319f3c721dc23fb6a786359a9b35e6c5bb10b8e4f68d221. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/GBKQU2515209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26425415e254a41730882daaf900ab200bd44e3f1a28dd14a412425520eb124f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:19Z), 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/GBKQU2515211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef6ef213e011e25329303060edeae579f935182b513539b7c2ac27d7c02af1. 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/US83Z2544188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637e9b487f79f6a23ea8ec7dd1cdc8ca53869a4c0373472fc4aeaa52bc1f2f98. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:33Z), 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/US83Z2550570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367ebd6ea42545b59d51f9c60e4252b0b034405b65b3265bde5d827dca6887da. 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/US83Z2483432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa383aee19792fc70c541860168b727ef60fef280d5dffec6e22d56e4c6d2729. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:46Z), 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/US83Z2472038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e2f451d65c7aef92e6a4039be391ae02092e23ec5f1ff9830ca3d3d8d3af96. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBKQU2198138.