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 0x6657a0d43475fad1d7f2073888e5da1d5a10ca5cc58461d84c32bc2c8f4e1d22. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a2e8ea5-3a57-459d-b14b-9a9c8d65eb37.json and https://artists.proofprofile.net/proofs/artist/3a2e8ea5-3a57-459d-b14b-9a9c8d65eb37.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 0x36ed7e88888f9ff631ccf36be1f860731dddc63423299cad11407c97f68b0dfe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6QE2358671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b6027be4de0600f5221cd4b6a59cb70170077f305d4c31139e0591664d2c8. 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/SE6XW2336008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda734f0a9afa77178e6029df6d95f612be51ec7b7e48257e9e8a208478e838ea. 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/SE62M2250756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e3772081d89776e105a09700a41b7663b7f3c11d49be2f94a6e725d698649. 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/SE6QE2380544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f79453e3afe33207ee4623ab0df4e98cb9d3f1b4578afd45fdc398a79958c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SE6XW2366510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8bf6cc9729d9c909ed659901f9da4a6f284dbbf850d552824cdd79cf3cdd2e. 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/SE6XY2344803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c9f779a0758d5d93c5f0030b47d73b9134814691263646fdbe6170009ab91. 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/SE6SA2392870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570caaaeb6b5809d101bdfa363cfcf9b23901eab8684a88257ade55701b9eb68. 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/SE6XW2336334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed7e88888f9ff631ccf36be1f860731dddc63423299cad11407c97f68b0dfe. 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/SE6QE2358671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130b872c8a532687255c97cedd5fabf970a82000c2c3c9892968238deeb6529. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6QE2291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27625cc01cf79df218c5dc346d963cca1ac5b02c3dd63375194c943ad31b6b. 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/SE66N2271366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64bb0b9dd5efea8506230862798bcd07d7a6450899815f9550612252a137313. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6SA2316372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50052a38ba7e9c216c69b8b61e5918356a3ac12dab195e10ca58779a5e4f0c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6TI2341441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038df41e79f5befecd5c65ae0eda2cd34dcf7008d6b42695f3108766a36bf37d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/SE6SA2320534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d06b1a180ac57bcc2abbae8c1da88bfed2f9147f092534aebe56a198d17e5. 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/SE6SA2335159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5535580be752e2907dbb15177a9dcfba6ad2974861e2bb2080e66c00fea536e3. 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/SE6SA2261150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2bfdbb6acbd04a56cc6f5f0dee334240344ad66608968eeac3ae9d443eec11. 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/QZTB82291520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e83a83dfa98e30e1a180e58eedde90ba14ff0d47906db260f00e288cb843cde. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5752292307.