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 0x5b3bba9ce6758d78012b71fb42a90ea7ae5562b694fbd46ba4cccf9ef06dac4c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ddf1022-146d-4a66-aa02-ed2fa2c4e76c.json and https://artists.proofprofile.net/proofs/artist/1ddf1022-146d-4a66-aa02-ed2fa2c4e76c.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 0x923d35138fba1c725119e9baaf495704741b97d456387e3c771c130fbb17c458. 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/FI23E1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe134b0daf197b818c1f0c7424bc3f704dfb04a00d6e6569bfb8075775c0de0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI23E1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bbec946c00f03083e380e4a09ca65241623c78f4fe3c60ec683eaa50d78fb2. 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/FI23E1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb8d1a30bed13d389d9d1fde13d5c8420eecc8d7610dfa4f17538e9c78b8690. 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/FI23E1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7193d7ae1cc28b6ac0cf677db7a1b6e50913c979d6ab2468b5596957b4c79d53. 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/FI23E1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab62d741f4f3206157d3824e9ce9534ad6a1439ccbda95b0430b9112eee0f17. 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/FI23E1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd419b15d32d15ffa1d5a649a0d0f773765dfabeab199584d77359f04473e3d. 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/FI23E1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde5ab10bf2912848e374d549e8695993f235d47a22dada93c0b5e7359cee2d8. 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/FI23E1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67d51533ad5914033516cdea04552f1e839a4f69d393ba528934a76b5dc948. 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/FI23E1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f1fefadffeac769c943eb2860e7d2189ab85ce33cedbd9f54244444d0e565e. 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/FI23E1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a7912936a38616dc9d28bc63411d037ab22bbce5b7455013240771435bc7fc. 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/FI23E1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577190baaafead74cea822b71270bb870c7104b52c5d604db0a137849a90c8fb. 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/FI23E1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793cbb19e67205e7b1b00dedab2da4ce909700526113821da7bbb3a519a45efe. 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/FI23E1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dea80217d9897821e2d26272a00e8bde630fd09d2af105cbc7ea379fb222b4. 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/FIOA80800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66685bbe228a1668365fb765c7f74c960e012ffedc23442f089122f1c35fd39a. 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/FIOA80800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52068a3cdb2ba9a33b6f9bbe3cd853390fb952ca245b4a7ee5587e07bc9fdf55. 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/FIOA80800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ecc8bf650f21055adf06131a4e3246f42c3ffb1cf3a6f1f9dcef252310fd9. 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/FIOA80800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf394610e6cfc6e3e7091aad3f6a3c01322b8a7a60a69cb237a4b8fb7b042ac36. 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/FI23E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0703660613264805b689bbe0c01fa0436ee7384a92a04764bc44284764c921. 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/FI23E2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c213ccd326d387fee0398d8602f77fb0a66ffd18c953a0ea145d1472a38b94. 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/FI23E1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c9c557fa8a0929813dde830f37a277b7926b77975d7dc6bb3bae933a528bf. 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/FI23E1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd496d42e2ab6d0b021978629ac8ec2d5c28fa7e017465fef994c2f9d9d151. 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/USHM81751736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde5ab10bf2912848e374d549e8695993f235d47a22dada93c0b5e7359cee2d8. 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/FI23E1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73859dd97065372169fb0aa647bc70cc46dc5928027964ae1605b22fec9dbc0. 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/FI0A81000013.