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 0x8f19b1ec1c8ea21292b1547cf70cd251153ae139199872a846d0e01738c08af1. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33fdc613-74ad-4167-874b-ae7e822f468e.json and https://artists.proofprofile.net/proofs/artist/33fdc613-74ad-4167-874b-ae7e822f468e.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 0x024af0f2db9a3205ce32fba5704b361ee9b2286383e1cf8592ab4ce0b012a6a3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USA2P2020733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc3593a4ee9e6f1e98e5eb53b211b375e7071a23af5e23f5701933c32825b4. 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/USA2P2030558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76caec36a7d0810a0aeee34083c1adee35312a0b23497d4d731a43139dfb83cc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USA2P2030559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17af794d248ec9ba90b1ec07df9477a7f20bbb14a413c5f6089ed49c349317. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA2P2030560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da61c3b071ba5c409469dfa54bf4cd0b4a73718867e544244a7888063052fa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USA2P2030561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024af0f2db9a3205ce32fba5704b361ee9b2286383e1cf8592ab4ce0b012a6a3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2P2020733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc3593a4ee9e6f1e98e5eb53b211b375e7071a23af5e23f5701933c32825b4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USA2P2030558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024af0f2db9a3205ce32fba5704b361ee9b2286383e1cf8592ab4ce0b012a6a3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USA2P2020733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da61c3b071ba5c409469dfa54bf4cd0b4a73718867e544244a7888063052fa. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USA2P2030561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1b3c1872900a1039e3b90f4c6a34e796baf89a9e859d67dcec201bfa0ba9e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USA2P2419155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044b353e2be7b09159a2d23e1b2c4a7513230e560fd2b55a34171655f9edebca. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2419156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb8cec829e3f9c45fce2ace13f79eb7095effe92bea2b03f90b55237001adea. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA2P2419157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fae605bfb1cd8bf7ad20bf8dc6986ba8012ac627db1b66bd878611f9b6eb2eb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USA2P2419158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ea831a5e4d70ebd70a1c84741dc7b9de2e73341bf040c3cd2153f55eb1621. 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/USA2P2419159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17af794d248ec9ba90b1ec07df9477a7f20bbb14a413c5f6089ed49c349317. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/USA2P2030560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d0bfe633ad0b1c0ef0c0b7b8299dc0c452d5aada605db3dfd1241da75851d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USA2P2419160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76caec36a7d0810a0aeee34083c1adee35312a0b23497d4d731a43139dfb83cc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P2030559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85897911a318600f57f64ecc0814a3f1920428ab38159a40f3d59a2df8966ca1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USA2P2419161.