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 0x24ddf5a250b41251d0eabe99ab9155054ca60775329df30dd42b11ddc0a2bbc3. 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/b2d5251a-14ea-4e8e-85ae-7361cec57507.json and https://artists.proofprofile.net/proofs/artist/b2d5251a-14ea-4e8e-85ae-7361cec57507.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 0x325272e94acec23e07db1bd223895c6d4cac1ee7840727e1d098a730ca9561fc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZ8LD1908970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c939e9edf1660bd1e45ff323b0238e8def81a76070115510d8226bd93e4ddef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES61967185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460ec994ae41a7ae3660c9faadaa0b45f6091d4099abd3f1c4c0b4e9e7c83e9f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/NLS6R1857238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ab075284540084fab4c83cddafe08e27629b9904b9e0892d947cc461667768. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZFYW2026776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe6725085adcc400c8dc5140115c10db8a09698099c158048edd224a1f88c69. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES92088668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2264f42396e6900f2cabba43af13f95fa8a972e47bdd22c4d1b99d492f3560. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZMEM2025771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1f12b332d90d427af9e9d5dbab94dbbcea5e66ac98ab4ea6327b243cdf30c6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZK6P2077614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc2d43a65f6c220a30ca284fe5f4aa0a271ba0aef5495b030774f5f1ad1daf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEP2204688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d16f770b13ad5c9df85fac0e7a82ce387799c80f205bc84f49061e1ebc2f52d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA42442180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba60a720bbb3eb3bc115eb6eaf4b9d271a5a6e97651db8c777b3a6ac072763c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA42442183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a072e0671b7224aed6eb6a6751b330c4f67b30556609b7507fd4715d861989. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZZ7K2441135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbe66faf595b840602b1d83fccad70c6b7b89fd3dcbaa1e0b81b7fccc4f8902. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZHN42541082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c37022c1d84bc0e5b97afb467518ea168d19853cb78f01cbb74d22d396837. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZHNB2413702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8a38114e2c2fdd7af48c8796afa5812dd4ef7b90feb2c28a248a543eb50313. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHNB2417637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1170ba144caa2aa09cec6465af7fbc2075159d29e8b6e98845cdbc6a4415eff. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHNB2416604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7024fbd6c665f4ce089ce9b88628d8bc82e6e1954952e24ce65eab53638aae5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6J2535829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a0b40f13ab156c48bca0c683b4bf344c94dc3fdd4b8e477aad0d5f75c4cd0. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZZ7K2455667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b073782d3cfca0dc5a975edf24a479d835579c561586ee24924df9e0e2bbae8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZK6J2523651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900170262a6a749c28ab93cc56eae906da1ef2480aa1cb6e0a332f1d47d65836. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2417641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2302e9eb4be35f675742cbea1ef2369daa45ad40fc91d2f084d9da614ecb9c43. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6XW2504257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25d718472e89115b00d844b5383ce3540e11f08eefdbf6cfe67cfbde7f48049. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7K2489692.