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 0x2b65d27369a95b87e4143f5c098601bac63444a67c9a46cd018944234610d468. 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/c4790796-afa0-44f5-80d0-738a188ba1dd.json and https://artists.proofprofile.net/proofs/artist/c4790796-afa0-44f5-80d0-738a188ba1dd.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 0xb0beb43f95b477c3f618fc67f672893f878671ee431a00596dc4df0c3d477e7f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:42:12Z), 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/FRX282164207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c62e85b460c4b6ced55dadb864dd055eb7b3ee3cf9baa0036d3c9fd89b1a37. 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/FRX762142862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03e76e49010e02dc92042e74332a30be8fb1f6b88990373091b6336dfdb80a7. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR2X42205927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb849243a6984e7b32d0799646ee6f537e5cfd42b5f83384c6482dacefe54c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/PLA552400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ba6073953930f08e69b30df5274828d53fc3767765e0d9969ae42264b8e90. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:11:00Z), 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/PLA552400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28767857cedb63165bbffe50fa8d1b6830ea488943dfb8df7f5ae98b845c5476. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLA552400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c62e85b460c4b6ced55dadb864dd055eb7b3ee3cf9baa0036d3c9fd89b1a37. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX762142862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb98f7854d8784286af6582be9725e02203d2cace1747037d24a37abd00eac. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/PLA552400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0beb43f95b477c3f618fc67f672893f878671ee431a00596dc4df0c3d477e7f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX282164207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ba6073953930f08e69b30df5274828d53fc3767765e0d9969ae42264b8e90. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:50:27Z), 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/PLA552400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde097117e996b78d2dbfa4c635e8a136ee1a203c07f977e5bd35de8392403c60. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/PLA552400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6548954f82c49722f24d1f4130a374668ffdb385d488637737bcf98e6d8844. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLUM72000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8903387fec2b7876a1cb77dc55936ebf9c1da5c222ed5a4489fb06be37418c. 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/PLUM72000441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2021d668232791ee0818fa7b46600cde4cb26f88fb10cfae663145d8781b57. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR59R2324623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc4e4455229f2fafb23744b304cb07a1d09fff9bf6d9e3635fd244f4efb07b5. 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/FR59R2102713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4865dec02844adaa342b17cad78d220d98c545a1a0db2b8f622d42ebced56c0. 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/FR59R2102714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1500d89e4215f96383bc3ec9bbbe3b2d7d06eef906c58cdeb2df407f56fada4. 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/FR59R2102716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2975324ef2f9359e935368130173245e15f98133a5cc220a00531605f48935. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX202168046.
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 0x7c13c123160383e1ceb7903a7204ba2fbc0877fc29fa0ffccb5410e1bb6e46af. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX202168056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cdce010b433726e6c8464b7440b5ad4a41976eedf4e781c4e51d64f3dfaa40. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FR59R2102715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d314d75b5ee7ace39c85f15da7586d13e8bce0196058bef5f3b99accf3f17. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR59R2102718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492ac4457ace8fbe1cb22502a59eb4304d99204ae43f0f70a88c7357e5c6433. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR59R2102719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d2951359a924d6257178bf9f24535f6fee5d9d674586bd705d2f902f6a240. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR59R2102721.