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 0xeec0c12c23a7c78ef1192339964855cba4a239e8df8f24c092aff2d35c56e397. 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/9462fe63-847e-4314-919a-5044ed7ff2ad.json and https://artists.proofprofile.net/proofs/artist/9462fe63-847e-4314-919a-5044ed7ff2ad.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 0xd0eece017cd3ea07bdfcbb0e1f71f8a38fb06e090a9309384ae68f37aa82824b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HKG732315199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b69fc6b3dc057497d2fa489c2ff56f6adc6279e509644f957cb5caeea52b4a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:12:07Z), 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/HKG732289650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1708f834820149e3bb71a3a899d23dd1ecfcdc0b8496387d920cfb19fbd9efca. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/HKG732289053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0e924d55e3b0ad2ae06124534fe4c7448198cf6ec122074d167e857d2b4c3. 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/HKG732305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abd771c472cbbff9eb10748b12349b595844cc826bfcf80feb514c648285b51. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/HKG732303922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b52178a8c8159f63a23b765408517d04865e09a0167b195ea66d4d1c741b4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKG732319384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748089441b17b3f398145a43834d282aa88135e3c5422403a84afb63b58621d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HKC992324014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499160890d3406f0893d84804ce57262c785c39c612e1bd854ec0d710ea3c452. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:39Z), 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/HKC992324083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcd92d88dc2a3c96905ae0d47340c67d0004df38275b0fa9f0aaf7506e6eff1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWDL72305059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877c490a4bcf326b93db4ab9f5ffcc45c1b56fc7e2b8e668a8cbaddd32545c8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKC992324094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a2b517973cbd126810ecd4ba0498e15c5f9b1efbde3aaeba49bd8ed0228e0f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKC992324038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a776c1c9e991485bef849a040956bdb06f19a7d2f99f082ff181dd626e8623. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HKC992325414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb905d6c788b33f5d930cf219c8d431ba1ddd5e6ed78c833ea6fabb8a7e14dc0b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:38Z), 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/HKC992325918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13acc5578a505899f7b865f19af9a79a5d85e6fce7bde10d2375e25640876dc3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HKC992325920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b23732b7b1879bd937f6a987a70eb170eec3ce1be86859ea24d4c082ec78452. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HKC992424257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b36a1b491c00e6dc6836484a26525e6252c3e78c9729833260e03742cea8be. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:19Z), 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/HKC992424455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec171b462e8ffe5ac3fd25529b48e325ed5e83985d3d2e783b61d2dd74f720. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKC992425285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a762127126e92ec05144c9f03a51be2e4b245975f04d5c30b559cbfbe12d5a4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:32:00Z), 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/HKG732465075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6af656ab4ea547e57647a8d2e4194b5191ec3d9640e46f263dde09ce82737b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/HKC992524477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b5d5d3abdd296a1cef9ebc46b2284064288c44a59f9bc5584b24b2eb8dbb05. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:03Z), 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/HKC992524977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24596da043bc1ca1a7b1799f292371defa7e3a5626d60ddbcbbbad00c86956fb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HKC992525069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0432493950dd0babc90561b1ddc30afe0ef94316c07e7b0f6a9d00e5618343c3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HKC992625382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78c219085c69133e39e7fb5100af48a46e1ce4cef68db54e48c9ddecca20e3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKC992724078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371f1c2fd2b3074bfec51c6264ff162a37fb16f83fb8ad194d666af447da1b46. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:50Z), 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/HKG731401991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333de8679a884bb07c0a8b528d548464a3adf4904f6f6b63bdf2ffdba517cf80. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKC992725882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258a897c4d0e68e59b2e5a578f1d9dd51805eff1a69e2009bf41223aa34685cc. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:09Z), 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/HKC992924643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129eaa04c721fea722f5dbe45d6eb6511b4f03d5d017f7a9397232f12d34af8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HKC992924597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d89e1d02a64143c7de8a4581edf5f487a4d091a0fbe3cbf0b1f3a42736150. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HKD012448534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99fe41a7845157b0a97ab8d8f60ce074ea861f16d91d25857240050be74d5bc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKC993225784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f2b9c3b6a0debb2b4cc5e073f64cb51b978c3a244c4e7ff077220a09c5d370. 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/HKC993324624.