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 0x746e8e4a559fd53ab0ee3ef9795a85ecad79a0952d742ae6d585cc53f6466b12. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8aef58a-2f86-4a0d-9f49-c2228383fa8a.json and https://artists.proofprofile.net/proofs/artist/b8aef58a-2f86-4a0d-9f49-c2228383fa8a.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 0x0e6d03ec06538d764f785509cb03a71687547117432c743a54003cf28dc2a2f1. 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/CA5KR2256206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d39ad350eef6ac719b9a2fce32de7f6a0d78013db6ddcfca86b730decd061a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:58Z), 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/CA5KR2256204.
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 0xca57ecc04d19fe303409a4f34df99d9170a3a3baa96fdb40ff5e3928dc26f398. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2256207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99951beaf9400dfa073620a65e235b23b651a04a0a57433f6f3c9101947f656. 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/CA5KR2131114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9456f62a3c203e0d30d5d2e0049a400ab8155016157d93d8ba264b24bfe0915a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CA5KR2131116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a23143f0d7588d28f49f4b6fd00c2e880bf9ad9051b35b43ed129f14a900e5. 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/GBKQU2398536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02454791e4ce0ccfb21eb57649ce06409baa7f9788f1cebed339f471f1a9985. 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/GBKQU2398537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7145f99c06bef1130a8ee6e43285a69c03f5a1b6ae95cbf294d3a7fbfd34e8. 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/GBKQU2354922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2231f1f7ea3d6784906594593dde2811b315f80ddeddfaec4db71280c0fde7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2315601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef1603af13abbaabb81eb4cca19b9c345d503148e96d698682a14a943269b1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CA5KR2315602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626d11ce158e879a7daa6530aeb3c32916cb2ec7b65d3723b6d7245fe578816. 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/GBKQU2251731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd5848e2a3c2ca5213a0f50cd16fe8fcf4afa688131231663c2b69b85dd8c5b. 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/GBSCL2135074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5aa8bd0192b6a221ba2fdf59703a9ff7f8a3b8b17aa96e37e49926623aff6. 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/GBKQU2162569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7826e5f69f7c32ba4540b9432692de45e24c0aff1a09908cfa73daa6e5d0fd5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU2162570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dcb3d2cdbfbdb40992061730cab6d310d53d33665b416c8fa5b191521f4641. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2146405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd18bf3a0fa31b755cb8afd841ae940b89413e75317ab6663261a3d379a290cd. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBKQU2146406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180bf48becca8ff3432dc1aef001a80d1927aa472d5d501b335e1e264c21ed7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2021734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a36c0ae3223bf7a4a142837602e46cd35e472b7850770dee0088105a4ebb9. 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/CA5KR1962339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb452494fc218e05c68c71e143ad56b80499802db26ee4dec73f65abb169f5d9c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CA5KR1962337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e114f906cd2ecb0dc8a6b0098fb37746dbbf6c3515e4bae03dc1b57ed4f3a2. 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/CA5KR2192250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde484f78bf61146f5ad8e24115beb2ff28c16ef8087bf2bbc4d498e79221a6c4. 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/ITI952100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbcae6b46fbeca9dbc6674dab7826e923893238ef4cea7f0720675c96fd9535. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA5KR2215436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e259bb02efcd22975da5826c999259a724d51dc900cdd831a6d5b0f28c74c61. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKQU2273495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed19de9f02ea36bf604262b0c5eef0922509a81a6f395cdd1f29c6c4071e58. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU1960283.