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 0x39d59c8bf7201d05253e65c7341f668a2aebd99c199bba0e1ce5247cc5388f11. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab421c2e-0ccc-4cf0-9d0c-de9a00782887.json and https://artists.proofprofile.net/proofs/artist/ab421c2e-0ccc-4cf0-9d0c-de9a00782887.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 0x9084bc99d1f1f27adc3ad3877546ac382768e82343a6b8a53226c89e38aac1e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110805301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a967abeaf7fae81755fa810f551c60603109863a880d096c291173dd59bfae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110705512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61289ab1e6d9c0dcbf4823284ef289a29d466cafca9eb8c0a89003007e00c3f8. 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/ISA110803113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe754aa3b028703df184a4dc80fc7d551e5f4a8f2cc986a6258df691f6e21c26f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA210800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58493494061d01a55e123ad10a4ba0dbe8cdffbe1c96e2e3102db4db90637054. 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/ISV440903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b0abaa35db93e4af62bd0c0fe50fd1f1e18ef2c34495e485e8f85dd67c225. 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/ISA210900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce1d1339eb55cce2d20dc759c2c54c494ac9b1421ebac07f245dabe170ee710. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110803905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ba96bbd80d2e0c26164bbfefabd1a8e575a48a7d426ce9e1bc94f516f2aba. 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/ISA110305411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e58431a208fccbffdb63a63f37b851a8c7acd8f376962a4ffd128f10f0322. 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/ISA110503508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ad143c9bee0e64517c1198970690248e3910bf60d11e3898b689903d1edf3. 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/ISA109904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad421afd958b67755f1a7e464ce7d6656d825f9c13b7b62f3cfde64b843644. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ISG100200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90979293283edf49f3ec59854dca8895e3e859e1a55c2e40dc7fddf82bfe092. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110504801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ef5ed669fda67ae293b11ad1842ed09a7ed80b9b92f1238ade65e50399941. 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/ISA110508309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab09ce38a499a4ab85297ef9cd4d6d401cca3be1cbf2cab07c6b251297dac53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ISZ120300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa22c521186f5e5fcaac9ead34ebd921fb30052e64be711e3f3767ecda113df. 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/ISA110801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd707e99f7d0c1a0b5c95ed39d9c5e84dee4ae436347d349f71b6b64a10ee6a. 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/ISA110504405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b593d4dcedf33f6a05d4f09de32862c4b82ba1fdb3e0deaf01de36f7a502797. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA220900744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5e6bdd9249eb0119281d70e44827c457b8a9d79d87b9a1069da1f6170155d. 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/ISA110603104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c44cf6ed6415728c011761a381c3bc4fb638b61b0f84c1cbac8546414ad62b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA109702305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e4551048946c3ad4cbdc35530c0f424dda9ba4b65de7742c6b3bc68c5b84b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110507213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ad4f82587f9af3ff66afdc61d85d151bc0d248fb64fb5a45f03529fcc938c4. 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/ISA110702409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab869ab631cb725fe134bb7b7d35fbeb672deb373b4ea89402f5641545fa654. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110507201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53567ad6b9d408015e9ca561a654a3c449d7483abd912823e36cdb56ee10964d. 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/ISA220900745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2460c4ee58e9d54c5b252af06c32a33222aaeb75e47a0f1263900ac15f7d93d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA100000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b570b515f5090deab806a8b7bd2a4dc736a949c329abc17068900200994b2e9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ISZ120300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e4c543058662632411e6cd853f0974fbf9c2c49d139eef4d0c112156c34f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110806801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857195b5ca95e0c8f720b06a63630012b882f9c0042e9aa3996615f414088eb0. 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/ISA110705201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4a9d1878256e2fbf789390e0726acfd343cad2dcf116ad8c54de2c63c2056. 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/ISA110705202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e27f9ed6b9cd1bfb98dc4cd003bdf75ef126c7246316635872420838a7a0ed. 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/ISA110705203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb9b217cd7d2cbd4e76bf57f44d11b52add4257648bda93d34e6e634953a2c9. 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/ISA110705204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7541de7c09b86b481736dea1e964a418503689d5dee58ff1c204089e55db72a3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA110705205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc45bea847dd9bcc6b23a5e5b7fc9f8953d01c795e71df47fda8a91b667672a2. 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/ISA110705206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d474f732a57d17b1863935999134765b9710e6836769345603e23e87319baac. 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/ISA110705207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c2fb62df2d0f17a7f12fca4fcc2cfa5fc5c55ed5e008153a1b6025a9c8e00. 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/ISA110705208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982a7f776cc0a3e92ad42a0a2ce5076d869c3dad2f3cfaa622b0df05de4be86c. 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/ISA110705209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74499e9806d57c8e8dbdb7c43066e5c84bdbc126189790c57d1c7628a3278131. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ISA110705210.
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 0x97d0801b92551d15c0ad2e82ba9bc0a3bac07a6d731e1cfade157582f02072ec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ISA110705211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac7fe72aefa6cb3d297ee18b8bc395cc819ad7f07eafbe1e2276280622cfd9. 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/ISA110705212.