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 0x4358a66b5a4a97a5d33b3e86caa372b4c639011f14316adff7b9562124fd5aa2. 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/b25a1b35-dece-4e6d-a2be-486524eb8c26.json and https://artists.proofprofile.net/proofs/artist/b25a1b35-dece-4e6d-a2be-486524eb8c26.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 0xb3d63db51e1c81a0f51a8f9e390b2f342a99870d7fec46a2ba81dd97bab5889b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZES92087908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbdaed65f13ee6976168fe4f1a2d45acb13ab7c7bd028cc39e1dadc7022c1b6. 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/QZHN92114469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6ea0b676efb9acd4155195cbd321d670f5c6801574c0371b485546445d5fd. 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/NL1LE2102516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6e83c688788615a15e0ee8718155b265eeeaafd07ecf7495b8e831a49aae1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEQ022282804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cfa6425e5531112bb34c6678b641a471d717a9d756851c3d63db780b4da2cd. 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/DEQ022283084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494d426b7c9e046c4438b3ffe53e14f1b150f272c77d0880b0e8930458a4f8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:09Z), 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/US3DF2580705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3584e7a0fe07846c060be1d396df1fbdc13f44f14052d934fd899056b71ab8. 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/NL1LE2503745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba28e4e3f79786864611809af7b9be3a4321d7ed17792f937f0da2d4b358c5. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:04Z), 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/USANG2542868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e40041574c3059f3a823c4647b62d6f81215fcdbd0cf35bd4bda1b672b0d3f. 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/NL1LE2303442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3174060e9869eef682e822575430a8715b6898138901dce7afc73a722ce98. 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/NL1LE2302982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb4865e0276ea4bd516d05ecacc3ce30edb582a785f15fff55887dc8028057. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL1LE2302882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6ea0b676efb9acd4155195cbd321d670f5c6801574c0371b485546445d5fd. 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/NL1LE2102516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b34634109d2b31e27d5ede3a24d8a6d3260fed5e6bf1df16b99acf29c624e7. 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/NL1LE2102097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592fe234d8c5c3768a379dd37e5f2103ec3ce37be3cff53d177f1d303b663ff3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LE2403666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141a01cd0356eaf97560f1d3ed14fb5580792c17186d7a85b88dc321de747ea0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LE2403563.