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 0xa6eb02c12868f705b96e7850165bf059ccd1f0a97e118b1f39aa38aa9cebbc3c. 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/1aff24ed-5cf1-4552-ba13-87526c2b9210.json and https://artists.proofprofile.net/proofs/artist/1aff24ed-5cf1-4552-ba13-87526c2b9210.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 0x6219e002ad715ada6d96dd3971903c7113cac11023dc800d9850361a06974959. 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/GBKQU2404045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e74171408302cba4e7be1ae4aa8b0688dfb1200ff31e9394ddbbc5d161873b. 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/GBKQU2404046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc278cb0dc7de57757328b25fb3ad2d5330db12d7fc88b6f8d387f3ab341c325f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2404047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa0a434324e199ada0890418b810f919f8d8b907e2dca45551370f09e994936. 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/GBKQU2404049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6422883350c1ba185e91430d6dd5f59f562198bb858d8e421bedc2de707d304. 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/GBKQU2404050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00043999d13887b665405b0b0e1cc90f3823e4ad6a471c3385a9a1ce22139a27. 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/GBKQU2404051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc2c21155a8a279c07ea9ff9778ce4827ce9cf80896f5a7922419a12009d32. 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/GBKQU2404052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6bdeaf5c9bf87b17399fcfe27e417c2708d85c9d683339319cf10bb54747b4. 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/GBKQU2404053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539e59f741b97a8ebb400421e77b42537efc0e2fc66713f23370d2ecefc38dc8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBKQU2404048.
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 0x552f7402a2252237adc615840f9bc0cf11bfaf938ed453fc84d5e07f58d57181. 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/GBMA22309183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c67917691d058f7775f25efa3b508f5be3372b2d86b6c6cb20039fc4de8ae4. 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/GBMA22309185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31505352f158ec2a8ab675c71a47ed114094e4c173351889e652c1bbf626586. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBMA22309180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e183876f6dd48269d183686fadad4b99541c82ca8d9932b781b45d7c7e03ae5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBMA22309182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a829cb45a201c78c80669b6afe9c53553e80b921c603591a2c55c0a80484416. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBMA22309184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fadb1880a6b820d96156789f894e58ef5a467211538bf525e7e9ff8f85bc53. 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/GBLFP2353503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08401a53f868e9181201e142bb717e3aa0aa1ff16c36b9766693738a73418a5a. 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/GBLFP2353504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626e2c203b6297bb326a3f97439b4b9295c8bb1e75979872bbb3e05a39caa87e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2353505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925a35548dd8d139ceb1207dcebb2d4ceff6618baa82cfa1b60ab230b456a1d2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBLFP2353502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4596348ad54462ba5f68fa33ca9ab670e73cd9a4225a30f63fe531635b0c89b6. 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/DEY472378653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac00d2114e051f7ed15df03cfa4eb0f855d1242cd7fcabc5f379c4909f5e9c. 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/GBLFP2378278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c25a3907cf2f18fb187eccab3d1f554d96bdc6d255939342dbc28023217908c. 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/UKXN22310777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575beaa958019c3227acd55ecb740b9c8f8d45dce857c2a1414324730eb3c6d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEY472377138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168fcef5a178e567350ef7dce31fdb3eb93a273cd5a344d6560b6883b9515ed7. 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/GBKQU2379034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8456ca7a524a3ab37ea8b7fa9674ed61af6a6a8fe5be6e47347ada1cf6ab31b3. 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/GBKQU2379035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2e71dac30c197e77670546fb903b171cd3de2364994dd3f5cf9eec94c3792. 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/GBKQU2379036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163f1e87b006dd6c989f845a99935b2ace52ebb1dcd90262d34d9f04463e0ea. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBKQU2379033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c43a04ef15619249a8b32ccca7fdd36b559527386bc200d87c5ef3cafda2cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2390089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4157673fccc07a903370652083a91beb714b0503ccfe1fe9eef51a9fee2e51c0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBLFP2390088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40006e46abbadb3f7da12181224548b7668b450d7a2caddddaec3510a30e5b65. 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/GBLFP2379100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0a072d3639f05cef20bfc4e4aa4401d9c8589ebbbb08a72029cbd580ef5e03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2379097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a63c57dabaf8e1685f17efd320097cb610e4529db018a1b29dd88878bdee98. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLFP2379098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce97b659d43da786a10babe5d683e6f178f8f5a0536ee8954928f6bce4b5ace. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLFP2379099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb5ce5a4961bc2cdc21498756ca04316c8cb4e840228fc3a5580b4dd509edfb. 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/GX3Q92319185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238d364ae0c65c7ef026b1f15f8033c9fb3881c1c0038794bc7241011a5cf113. 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/GX3Q92319186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ba41f9c0d4d979cbe5aa06a436b4cfde8889cd563a627d9959a21ca6f51b0. 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/GX3Q92319187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fde176f0241ef621b3342d6ec39c406ea315e8de8b4490402d4ef572a19b1c. 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/GX3Q92319188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207719dc576d18e555c6aefba2c860159957c0035990453d30668cd2162f1c24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GX3Q92319189.