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 0x4c22abf4bc30f64a0a9ef3be9590e61bf39fa100415aacd148e91b4bde4b8965. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/467f6199-081c-4797-9a24-7f12ca095635.json and https://artists.proofprofile.net/proofs/artist/467f6199-081c-4797-9a24-7f12ca095635.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 0xb35288d389f39b0687c1f5cfa3e4e9dfa7ab47aeca2cd21945f5fc55f64e6a5b. 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/QZRP52439636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe945b9ecaf29a89fa6b28f4c4737e4be1424fc4074f4d923c1b8815f8866017c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZRP52439633.
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 0xdd3ba65ba6eaea50c8d2de3e6fda315e3dacf81d6281f6a6677ba28ede82a980. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZRP52439634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2cb3412448c0a7847e5027aebb77cb43c86cdcd9af20584c8b3bb31750430. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZRP52439638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46089fb944d273e2355e199b4366ae669e06954fe535a2d066019ed5c715154. 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/QZNWS2408319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8b401308b970d730582e7e4205f0515535910b2aa3a724c18ce58ad71c042d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWS2408321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe077a60d377ce5b44ce39afda1da5e1f2987873951c038a6454f7326ed3ecc79. 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/QZNWS2408322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ca81705c9d80cfa2aafe65d1df88cd0141c0ac04bec76ea0b8d10aa5c6210. 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/QZNWR2389097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2e9823cd5d4108457f5a46b455396457a4b893364aa9292fefb0cc05640d4. 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/QZNWR2389099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52940e332d08d6cc7e22bcd3f97f667a46f33cf84cfc17b57f84c4825e259e5b. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QZNWR2389107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4125922c4ffa55fbad7857eab7744a834040117ed3130e6be20a8c20f6b91852. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNWR2389109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd50d345510abac14d93c75fda10232f199cd84d05912e819a091a037b7963. 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/QZWFM2371858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e225796d58fd5b51abfc12cab4b6caf7ad2ab30cd7dafd7564b3474c457ee07. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWFM2371860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97171d3265edb9941824c7eb2f9257cf1fb3e00c15e71ea49e808e18a94e090. 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/QZTBF2387078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf091c1a2839dde6d8bb8a514c414a9bd3ea916c6ca11ea5f0fd07770afea2b46. 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/QZTBF2387079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab7e8d41549fee2cc560800f29c60389a08fb0470902141c8bce0e16f9bc45. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTBF2387076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde05e1059669b3dfeaa8573e8cc1d6abc3d90a03e5c274d01c03c36ddbc1a0c8. 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/QZTB72321962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f9e9b0a891fa1585a0ec0426aa721cf640884d2272913c0c65906fd81bdb9. 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/QZHNA2310151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf2734b63aa8f79c8b1fcc5a75a84120aa86b7f1411101144a3337c82246e9. 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/QZHN32334455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4477caa4146a1654164af6e6c20eceeb51fc9eb98c897a8bb1a10ea34c1aaf. 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/QZHN62360860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cba610c4c6e6b9ac8c27cbfb33b12a971dda1e82ec1df77337120d4406670e. 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/QZHN62360862.