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 0x73fa93d804ea29cea761bd171fd278b66a37f742b135a33bbe9f865ec5dd6048. 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/2c0df31c-e335-48d7-adfd-060fc203e852.json and https://artists.proofprofile.net/proofs/artist/2c0df31c-e335-48d7-adfd-060fc203e852.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 0xf10744d038cc211330cce0a4b85abdc28e6ce0e0eba555858eec791f3d48effd. 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/QMFMF1518897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83fd188fedcfc742b01bb50b6927e09522c5e4284b4a5376758fdbdcfb530a. 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/QMFMF1518898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b8a82b48aca46d130cffdd3bb0944f79f0fc4f65ece7334ab17d47159e978. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFMF1518899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccf779750764463c1ff3e410aabe6bb8aea22f350d671eb6727b012d7e99800. 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/QMFMF1518900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f7fa5a0a3bc063bb9368af77b95dceff3bf7b586b3c43311e77bffd9396365. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMFMF1518901.
Slizzard Crossing (You're Doing It Wrong)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8fbbae52a64c12eaa1d83493cea85e2ff9f8d898073b3f59107261514c4e06. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QMFMF1518902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbf91638764bd1f76351abb1f951b654e0bb474b329dba7dbfbc510c7a9485c. 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/QMFMF1518903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624dd9a2430eb6cac9c95842500f86f69d63dba6faee78dc25fb435d27bb92e1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QMFMF1518904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ad444f6c60c55db3625e918762e56ffcd5d8575f61ace7961379da0fb2d87d. 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/QMFMF1518905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb66d489705535a7b7cafa93a6277283435e5a511189dd44ba51848c42d4be. 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/QMFMF1518906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad41cd3d8e0b433246b645fce22b55e9f829604d697e0beb41145ab5a37363. 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/QMFMF1518907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f3693df59654d6c6a77fd7b2f6a4bca7f224391c81a3f17f11af0766efaf2. 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/QMFMF1518908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc750a570d0e84e80f0d495907a0604859768688b24339d711e32393049cbb1ec. 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/US4K31200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda78d6ee27e24847032c720e0d760e9528e7981b7eb7af6ae05fdf2e281e36. 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/US4K31200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15eae0e38a5f299fddae1242945eb3b1f75ac5c2687fec1bbd69cacee504e67. 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/US4K31100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1bbf9eb6ee66294a328fc0870c69b1a45cb6ccbb8adaa83f6ddc97a7c2c7b0. 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/US4K31200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf559d82b042b6fa5f82a562a4a29478f1571d4ac1a9fe976da4f8eb209e58a8. 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/US4K31200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da9820592aef3174b404bb952c6b20db5fb5a6b5ccbaedf0f75b74b12766c2a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US4K31200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2644addefb1cca1ee86698d555186bbb473b94de61084b5f6caa6034f3826. 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/US4K31100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1afeea59563ce66f5ea00b897dd9e5202e9cf5a993ccaa05fa42282d4d8484. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US4K31200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04832453d76ab9614f3ffcede53d4def2251eafac5c90836e9dc7f389cb0767. 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/US4K31200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad74f5b127556f5bbdd5713acb673a497646f5738c067c764b2fd077690d220. 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/US4K31200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2e8e56ed2ba4ccb3a74fd136c4a9b94ad0a24ccc5f2e6cfe65d8e8c6e74c0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US4K31200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fd54d37a260371fd5bc92d703356590d284c3ddc6acaa7d005f2ba3e207ca0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US4K31200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c9db2e84a3eac69d873ad7fbf75fd96a8aef532b88613aecf18b473712654. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMKDP2100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd6db800901f2a1974a1632fb1a7aaf550a4a12edec4fa5f8c64c4fd3193a69. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QMKDP2100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b084b9fde574564289023fc3c0f546e3b1aee8b23b85d29a2e9aad3ae7b56c. 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/QMKDP2100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4523842d51c412943b370ca068ec47dfc24186cb7468b1d5e5486a40abef6a8. 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/QMKDP2100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282f0b5fcd61629d9bd0b3160273553b878200a733c05b42e916405b4a15b75f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMKDP2100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4523842d51c412943b370ca068ec47dfc24186cb7468b1d5e5486a40abef6a8. 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/QMKDP2100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c9db2e84a3eac69d873ad7fbf75fd96a8aef532b88613aecf18b473712654. 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/QMKDP2100191.