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 0x2f4b789f497afa59b4512b1cb31b9636466aa43c2f5db22a3ea5461146ec5ce4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e409b10d-1f14-4666-ae76-bc917b697187.json and https://artists.proofprofile.net/proofs/artist/e409b10d-1f14-4666-ae76-bc917b697187.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 0xac75ff2f0912580a5f8352cdcfc65b2255651f23819c9f9f19941d42c0532024. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BXAPH1600443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270feef14d6bdce770df7e4992be8abb48031155c18356556c8765930c32c63a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BXAPH1600444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f1598b85af0eff7f816ecd1a9612ca6105fc632de5753121723079e64417a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BXAPH1600445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a985cf1479144b72335338e6f97de38f3529cc4fdbf4937cf49b86e4adb9a7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/BXAPH1600447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b200bd10aafdfa69c3377e051b6d948d3b4153c26281efa39ef6b9390b487f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXAPH1600451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f2a5e2a5496b38dee2fa80156a912d7a51f26fe58456a55fc4168d6edd27e2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BCDW72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4449f4d01b0605008c027a503671e89c1c2762baf301114b4b824fcd9c71c6ed. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ITG272500743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd50854af90f088c689919bd5225ec9819abc2db405fc6f118fa03807273f0. 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/ITG272500747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86423bff44204b05dd874a8a7a5e1cd2e1c5c85275205850444953c43aa87cdf. 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/ITG272500744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78494f158f5a60d0a4bfbd87881e17d28cf2d5ae51f89286b79b9b67a79f2b53. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ITG272500742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4449f4d01b0605008c027a503671e89c1c2762baf301114b4b824fcd9c71c6ed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITG272500743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86423bff44204b05dd874a8a7a5e1cd2e1c5c85275205850444953c43aa87cdf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITG272500744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8907020742fad91988ba310523fef2b804978e5496ea0a82d3fd660d5c8c3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ITG272500745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e51f3f040d129f81128344f48b8afa641378fa8bbde4c14a38436eb20b83490. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITG272500746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8222f41c0fec01d84c181edb0e7551c8ade9327d21c8876ee9a61094f21a544. 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/ITG272500748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f878a3a70146d5e48bcc763bfc02f065090b5774022d8f9ecd33b1c49a5c2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ITG272500749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e8b81275c17735965393f189a59d27ebfc4eccf8b80e2721bb07864eda13f0. 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/ITG272500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2212206a6a0e46119845faa7aeb8e2351ab0638d31e3b199b698f444ddb5d6f2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ITG272500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f8b9cd91cd7be6783d506f9e61db69f3ea68f34c51ce29c5bfaabbb7eeebb1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ITG272500752.