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 0x0c89c4a735a58b6640d93bccd7fb966f7bf8cb0d4007695859e90eec7b76b8ad. 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/992747ba-aed2-4c42-9d32-185c1af9c9cf.json and https://artists.proofprofile.net/proofs/artist/992747ba-aed2-4c42-9d32-185c1af9c9cf.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 0x328ff85cb2c7e99608bda0b727e63030696c29a08c9606e9711e7371e16b3a47. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:48Z), 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/BX7SN2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3119e89a075e9e7b522f132f41c2be8acdbe6c4a5f6cf3ef93c0a914780cd175. 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/BX7SN2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0014e9f4159f6d7c4fa22781b341d407951bfd24821b4d1e86b5ce3874986bff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BX7SN2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e6e8d95d7888090cba98a90785052a22f23885cb54965bb71314e37b7840ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BX7SN2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8b4acb8f0911d999e0849518dd95200934bdc981bc07febd70c52dc541226. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BX7SN2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2272337bfd7aad7a3cc7f30944288a4417f8aac4f413a1e70e96c25b340b3a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:56:51Z), 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/BX7SN2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef7d3abb183963169b96ab83a41872cf4d973df921f1379bf94e23d57ab340. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BX7SN2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384378544822cd0110c903da6389a8b464248041b2d7214caee8d6e8b0aaa782. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BX7SN2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0962cf7b814ac667ffb90f7c98c72e52ba65a43dab727b8c5b2c0e7f88f5e16d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BX7SN2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd101ef461e1fbba082c4d8831bdfa31713136bb531d877d2112124c70fc347. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:58Z), 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/BX7SN2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4859edb118df7db69ae9bfe196b70358465e65a57021082ce8e8813bf21f7d35. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BX7SN2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a90e5766b45fff64689831200c2b221df9ebc6c79903b53921dec44056e89d2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BX7SN2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691b6fa7ff346b16814666b6264760ba5fc58357c3e4159e1dac288005a6a16. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BX7SN2400043.