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 0x29c7ba3a6b56fc646e219bd80e0361ed864c70b0f9aa42f299864cecb2a232c6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/781b6bfa-5f14-4491-8f39-ea3be51bddef.json and https://artists.proofprofile.net/proofs/artist/781b6bfa-5f14-4491-8f39-ea3be51bddef.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 0xfee733dc8f9fef4f533581c91d514aed81906c4336cc22367ebc64c7b0d0509f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5BU2513750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee733dc8f9fef4f533581c91d514aed81906c4336cc22367ebc64c7b0d0509f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2513750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea157cfb2b06fe221a31ffa27f1ed4f8397ff06e132f8c1a90a69b318cbff610. 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/SE5BU2521081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea157cfb2b06fe221a31ffa27f1ed4f8397ff06e132f8c1a90a69b318cbff610. 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/SE5BU2521081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb974df5c8b7d67f84bbadd16d3097d9f5306ac37f866c2335374eac83ca8ef5. 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/SE5BU2554498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612a52e1fb860e6dbe704898bb836151e42c5182fd22a9be488ec5b2306ffc4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6MZ2539716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2d13d43bb527d705514244c5b11b52bd62645763a6dc590c54020f3fcb1c2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:05Z), 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/QM6P42541309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8d5aa1a2e41c9df1a209e3a82f4016d967fa7063135fe3e4e888d133734da. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QM6P42554539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d151406be401899ec05b745265945f66bf595f4658e1ba850ee87425123fbf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:17Z), 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/QM7282506278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea19f7a9b0b1d5223e805c8b054522f9272e661da1d3acbc33183c47b7e7fb5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:17Z), 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/QMFME2510304.