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 0x8a5711145ff07bba661ddc4779c04454e01e94458a6afcf7f14c4df07dd84339. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ba58ea-3816-4244-bc71-2978822a7d95.json and https://artists.proofprofile.net/proofs/artist/21ba58ea-3816-4244-bc71-2978822a7d95.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 0xdbffb3458cc75962ff468dd465cc0673b9a0c5b650bdc9ad2f4b085a781171cb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:03Z), 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/DEPI82432316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46facdb40030234ccd5be9c2d897f8a8434f40b8c5ecaa37aa5253436e41b624. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEPI82432537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c4625f2576bdf828fa81a9fe8e968ca49acc2c08e3f4c085e07fef9c171f9e. 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/DEPI82432835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aab1dd026ab5423d2422f4ead526a4cb0a96246da04d285e1b4ad3165c0931. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82433059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187330f7e82ff3b76aa7b6ca475e1cdd835e311354546cb126e47d15ca69570b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82433356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245cbe00bed786d2c1b73ef336ca55b68075cce2d972422fb5487b3d3e6f0e96. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/DEPI82433367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541e43eb4c19e258390e80c49fa7c5403d1525d9dc22a3c32c61ed483230aa2c. 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/DEPI82433357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d50b8c996436b7cb3c63fb6c042f35ef7dc87b537982c8c47c967c657957ca7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEPI82433257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5fa505b77e7d8519da231b06ca1fd0aa351724d483b98d01eb89b638e5703e. 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/DEPI82433373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea29e3aec8dd68a6c98bc07836a8eddfd15f19856150bccccb6515b2f2fcfb7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPI82433601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b01ce7d82bc734016385fd5f81c2df1d36a0c79d334815bfe2460cebd4c5e2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82433216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8747b69c3d67a476daf0c168d6940d9c86ef037ddfa1c26e23858f5adf09d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:49:57Z), 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/DEPI82434699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ff23b53564cd4ef030fb6c39857c943d388dba4264a6c9fa09eb11e8ec858c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEPI82434707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b42fce13d9a0f68682cde87d735eac7935462b25f951c04da042ed21bb287. 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/DEPI82434709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd0798b224eb616cbddbf1f3288b2e363bfb02fdf8b5b02c8d9f95a5541616. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:42:58Z), 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/DEPI82435003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13809210b95f6aab6e178d0f6d01a7571af524fc3c9f2b25e688e6adaa6cb8bf. 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/DEPI82435005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a048bdccfc70c1db75ee35c4020fab4ad3d1c909bab8bae14922d0fae18930f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82435002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1091645c267a4d8fea055d0c35133b18f212948edb6f4e30b8c97fd2cdb99fb. 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/DEPI82435004.