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 0x20062843301e1922a6de29e22734c081cbee7c7dd644e38936fca1a20c335a68. 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/cf2b4b3d-2047-4cf5-b01b-aaf90ebc0f51.json and https://artists.proofprofile.net/proofs/artist/cf2b4b3d-2047-4cf5-b01b-aaf90ebc0f51.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 0xac1d770230b1b3558536d7ce6e8cc8bbb37ccebae6b29c4253478f094201cf5b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR8O22200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff0c23b4ad0ed36c0ee310fe222b62d9321ae7cd88cadf6ce1d686b3581a7b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:38:55Z), 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/FR8O22200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aba0ef4c711dbd34c0c67e236e27572a86c11d27994c75c8b300ff55f72973d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR8O22200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301abe8dbc1cd955068f37dfe1adc90a217726cb240135951a38992bb247537e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR8O22200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e946738f24c0afbd4dca31b723a12c67b69417cbcca13c115403b1eb7c0ceb. 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/FR8O22200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efacb3f6d6961bcb9cdb42755ca9bc51db99d24000c66864e52e9ce53a98c91. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR8O22200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef28dfb9400b95eee25857b2e7f5cbe23e2c0a8e7495b7c2873ebc6c3811443. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR8O22200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a215f69788fb8e6a262a549d99baa2d90f5f45bcc50dd91cd3da9316391b4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12212055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4df9da79b595d4d3f7c2b30b65096a106ca775a4054e8587ee8f28924511cc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:34Z), 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/FR8O22200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d82de60b850e6bf0d6ddef25863c8afd64f307c0d0b6a7dd31a879846e1756. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR8O22300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9a26eba0b2e6fa77b7338e209cb09e6d11e696137df544c7a7d5fbb8e866f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:06Z), 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/FR8O22300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7148a413dda87b67b40582f55b248d7baa4bbd9abb3ebb21169859e49249626. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR8O22300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7f6a700d32561c685c89abb36b5b88d8a3f33828c80f5be17b738c7f7c6fb6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:45Z), 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/FR8O22400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cfb19544debdf50e918eb1d61e48b0848e4f3ec5c3613494160eadecdcedc1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:34:58Z), 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/FR8O22400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f5e53a162705f353ad2c3aab864556db907180889f3011d5ed3dcc7ba4448. 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/QZK6F2349666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a773b37bd17cb38b99778bcda79d9f67e24b86c601dd468fb8b92e5dc96d89. 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/QMDA72390869.