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 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 0xd55d8ed15cf7df7c219f5f86504325179d803d259738c0d2016d700a8960dc9c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c3ef8c-002b-497a-bd01-3af94467cf7b.json and https://artists.proofprofile.net/proofs/artist/f6c3ef8c-002b-497a-bd01-3af94467cf7b.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 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 0xa748250315d774b499c2581f9e2cb25ab7523cddc434803b11ef1bd84888dab8. 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/DGA052344053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb05b8f2472be950eb687528e878792a2f19fad7edd879cf6c2d7183725cc164. 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/FRX282399050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315d4aa5c3c9795141e78e4b25619060079010fd99c4707ba834ab1ee1322df. 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/FR59R2346132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd03d8f818bc75756a07cdc177304f4375ad2c88287602f1135d198372009836. 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/DGA092222917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398339675a41bb7451c1034d7de31a4a87b27b7615160ab68ccd8d655c9d9c21. 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/FRX872202423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bdca9a40ab2a621887f1b8e2d63e3057cf617da5d06ea54cdeb0721cfbc98a. 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/FRX452265213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf884500b0ed8cc313d6ce4e7210400250989e1f81f2275da75ec3c6fae927547. 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/FR96X2297167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eeb7494c29df5dcba840f9d51d30c70b91cb9bf2a2bcd7e4d78354a99fe5aa. 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/FR59R2224533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6657430b98b8aa9cd1d3a219b1861e24a1ba54882041d3434100355472b8cfc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42234859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06381f4fe1a8f8e99a912b7f5dfbfbc2fe26729ad521abfb98d83c24b7b8a923. 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/FRX762197486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91524a3526a3853ee9aa067bfc0b497f3cbba48f58585f0674267604faeaa008. 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/FRX452154211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6773d7524211ed3ee87d64b31f6d33ec003cf10a24a4d5992aec78d57b1cac. 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/FRX282114442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e6bc4ac2732b5a32702c3be6d23f617b73e89d0eadfecafc2add0b0b809c5. 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/FR96X2198831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ea47913158e1a2a8cfd549790189fcd19812af3e371a3ead47c85fe2622102. 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/FR59R2159232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4be55508209b91891b7d7bd47f36402bef72bfbb224378e07b50e7eb7410e1. 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/FR2X42117812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544bc5cd5bb7e723ecdda38bef9cd2432f03b611adb316dfb2689886da4c4f76. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA062038703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10476da792e6debe59878e5bccecf7076a17279d206dfd1c4e6d95d8298c256. 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/FRX282032526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894ee64208cb3978779d9cccf576d2029e94f7972f830b14ca9a546b828f3998. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6906e3ef99ae498d830365f98ed930358cb5bdd7d35be444a03521ee4d527ba7. 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/NLT2H2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe868155e15da3709305ac0a2335178c43c9f7958e2755ac76f7c540a20663128. 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/DEAX12000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf52dd18492852e0ca821cc35d82e6ad9277c5faa8298b76633f8a20072581. 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/QZFYZ1981860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370c6351d411d4b9b194c2bcc8e46bc67602f9734fa6b90488b4aa69c269f13. 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/CH6541994401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5972a1a6e5ec86f6aad90fa51da5b2719b013884866367d89fe9e1b0b1031a42. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6541994032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263751dad5b234668d1b8a02e1f577ed9744a6021ec1bc007037599de26474d. 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/CH6541896221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c1836731c4df90bddf2247e7c9deaa77991015c5ae61129a2266c47325f45. 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/DGA092367066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c316e6265ebf0cdde53b574a5722ffaaf22aa7fd7df637cc0e5527b86e4053e. 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/GBLV62304151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a1f74772b117bd73ec0b63a21ee14e25a52107387fe5935d482ccbd7a4530. 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/FR2X42451943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a50d30be9a6cbad4531320750225a3386685d69ca0079c3f9f47418bdd441e5. 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/DGA0Q2347845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b32f6c5647861ebcb09f93270ea1c43724677b9e4d1819a2213a66bcfe4b3a. 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/FRX282432211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc622e298e640e0f9b946040fc9f6e957d4c322badd2408ef76ef4be89ae993d7. 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/DGA092368038.