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 0x26a40a80eca6681ee2cb173c4352ea521838707b7c519681729c12b2473f9d36. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81267459-ea8d-4eb0-808b-436e4305d6c4.json and https://artists.proofprofile.net/proofs/artist/81267459-ea8d-4eb0-808b-436e4305d6c4.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 0x5867ef4457e5488131d26ae4c91027aad2e6575361356bca70cbf3026265a576. 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/QM6P41423354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de3e6fb9d0c5a56fc7304ea035528943df67ad4ba8d7aace1e0c0add3361e3c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6P41423355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6961d3cb5e96226625a182e863281c77559e6a8af74ca86988a285ace68f6f2. 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/QM6P41423356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6b0c0ddc3ae6a9b65b6c1da4ffbfd96e10669f0c2b3a8516013d874db31f27. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6P41423357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c487c8d1560e2c324c7c145174b5290a57a908b53d0f561afe6d05e2d6f456. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P41423358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4556aeb78cf726ffcfc63deec016e83629c0cbe5396e0ca36c261d6b27231cba. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6P41423359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da9a3429025a0bd0d2e302ec37b6fb9243f64227f3d583aa924b235447a544. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6P41423360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105661fdb652a0ed503ca96086ac7c973cfcf1ba13bbeb916977a584f3995b19. 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/QM6P41423361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3e45c2b643025c6849aede2161a8ac3c480eba32863d8b14e6acaa6a101f6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6P41423362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5828259c6300a00d242812526dc54cd41f37163d429900bafa3e83df7ea7a76. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM6P41423363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe604e7c493ee0096dfdf36f2b32f9ff43f3cca1d99c02b21c899cb0954b23129. 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/QM6P41423364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a51bad77ea41c311f6c704ad73b93bb4981362d917deef5dcb2d9a474703a3. 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/QM6P41423365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387fd1d504bab27c3188938e0625d3e94f0f1775b93b43995cc2394741a408a7. 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/QM6P41423366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e747e92005af73ace1a70fce90d0a28c429787d6f1ad62bb98799ea17ffd899. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QM6P41423367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de54bb051e4d46f7f571fc550924c26a7168ca4293135c1064d1dca4bb5587. 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/QM6P41423368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded4562bdaebc1a2cd550afc2f7299fd883d3edeb7f30520bc1b35acf553f920. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41423369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b3216ad35519fb18c7b6b9adfc35f203b812e94c49de86186fae88daa13713. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6P41423370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f907b878d966428186d21ee66c698a8762d2b1a1b9a9c36f85b79bba9bed854. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6P41423371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1614f6b3cd8969e43cbccc5255adc52016d010d4e1b0a5e46abca18ddcc5ee1a. 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/QM6P41423372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d782ecedc3e09cda3c8fcda77482b2f9043054779f89921a22ecac6e26b15a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6P41423373.