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 0xc3380b2627ca447f4bd924d34d25871e375c2a031955bf9439b33a9bf35feff9. 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/59333984-c71c-414e-ae9a-ec7303a528e9.json and https://artists.proofprofile.net/proofs/artist/59333984-c71c-414e-ae9a-ec7303a528e9.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 0x781f331c4c244a1ea95de00427c0173242f0a6ff7516b519ab797598fde6f626. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742202471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080428c87b06b2b200d17e28813fd9be22c4419491a386549e31d2923c1e45a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742428638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bdfd3c7f8d9f82718a5fa8f419fc2af13b44cdf4d980ff9fb36232dbbd64e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742410472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aff85f3ce44dec3e1b0067a200ce873ef16c03faeba28c2d28c1f703073084. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742319520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b4ff88ce765930ca165d47f6db679ac4d62133dbac8c8bb186cbe94aad9fe3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742303287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa740fe8d28664d865cc3e22960ad6ee3846bbf3b024bbe874287c1f8217411d6. 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/DEH742302409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa740fe8d28664d865cc3e22960ad6ee3846bbf3b024bbe874287c1f8217411d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742302409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f4ee2cb54b298589e5eb9a2b49edc6ff79f818d07942c09745341fde408d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742227141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7def315a9a02945adf2555bbb957d95e03718a74cb81f75572fd8ad56ff0b53. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEH742221474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb674dee05aee6410dc36e4979622891c5539e9277eddbd0dfd7350edebe35c9b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742215495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173582d75583ad24d99880e4abf2b07ed46cd89644d57f605a9b16855583d122. 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/DEH742213932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d448f6b599ec22cc7dbc8f9f6e58c39eacf8454f2f5a27f91cfacc0de33ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742206856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77032943bbb9fa6916a57777fe4ec030fb352a86ad02083c6a7ff602a4365e0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742204207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d1375464b2484b382d0415af7dbce848d1643920b4b099fd49e25dd1a87432. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEH742203574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83554d837748c7f99db9c57da371706f7c53968ff41b2570c0996db9c432606b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEH742201508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b215f3df90335e9505457665344673f544fffa3c72a3d7dc1219dfe6f81c97. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742432926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080428c87b06b2b200d17e28813fd9be22c4419491a386549e31d2923c1e45a1. 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/DEH742428638.