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 0x2d6ca8423f4a053ec126803823f632d367df57ab7bc63c712789ad5c25a94f5a. 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/0aa8edf3-4c10-42f7-8819-85571ed909b7.json and https://artists.proofprofile.net/proofs/artist/0aa8edf3-4c10-42f7-8819-85571ed909b7.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 0xc42c42dc9769fa4785af3764720d0fd9266b66b483ffbd49aba3b2d33767dae0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PYC842414891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6dfd8155fbdd958d3bda480fa456a1951763af6e5355f54df7a9d9c1e9bd85. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PYC842414892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdff20f6f20c93bfae3a370b126a72cbd278ba69a58e606c8f865c465550bca3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/PYC842414893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4133a23b8481ffe9ad368d5d97fe7682220576823ec39d357da7cf8bb834370a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/PYC842414894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ac839cf0077c263beae6fd60083ff4171245b18c4cf83d3f8e88a5b23f4c88. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:54Z), 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/PYC842414895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8399ab477115667ca26e7af1821747c36c9917b39834dd4070a8853a1780a0d9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PYC842414896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d96b29ee5f4b9a558d2c05abe7b26a70aa2ae64734456dc3a909ef2ba277f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PYC842414897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e9e9f25ab081b3e9ee2faeffc464a8e42f9f7115eabdcec8ea9264bce9b30. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/PYC842414898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e32e85f1ff571b87b4fe92a76a73eed9c5bb13ea71ba9db3bf87eec2c52554. 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/PYC842414899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36969fff1acab966157c3bdd1c47fb4971868b62ec17e272653297b4217ad08. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/PYC842414900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d121501bd1b318ec0b7821c2cec3162084d4bc1cb114a45cb36ea791ec3d4. 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/PYC842414901.