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 0x2b42d597d3b6d8e73f09f3c83ad32aa3dbe1fb95f0a6724b47f4881258bdafbe. 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/3ad9304b-a76c-4b7e-8910-d4a5021e74ce.json and https://artists.proofprofile.net/proofs/artist/3ad9304b-a76c-4b7e-8910-d4a5021e74ce.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 0x3b56079be631ee031dd8b47e774ffdb08876f993269a18bdd33dc5a775eb5c91. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM91323099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7071122bc9ab145faebd211712dc477a581749fc9bee638259758260a56b1e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM91323100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2fd711ec4b0a2a72bbf3a3cb4fce3669fa2d0726fdabddc509465b4ea759df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USHM91323102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6abaf07b233710c26b2b45497950703c5711e3ffb7732114e2e7f31e2030f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USHM91323110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16133167956c3208373cfa016e3bdfb5fe16a0cb6d38a0a029ccd347476e2404. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM91323113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8136a70308813f606a552c303198a0dd60c076f9f37633e543dda7205f26ee. 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/TCACK1500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9341e1dabfe3479eb8d515c0aac8297264ad9fc57e7b77e195d7186b72a072a0. 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/TCACK1500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2f4ad0231157c6c11a45dae0d4e544cc320639e0cfc4af8a4bbec40c74f2a9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCACK1500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4162e3ce3b16ca492f8ad428559297d487b8382c907b485f1f70f0da5c39fc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCACK1500346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e5edc86581dc4c001e88208cfdb65dc187d8adf1c7044d5b1430c7dc1ec228. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACK1500352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351104aabc81fdd3a92863c0bb140cecd49c846a4c997f71c1a96956bd45838. 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/TCACK1500356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648bb0bd88335d1b9a86a50022b4e405214f32c99e052ab6cfb007fa1744ce56. 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/TCACK1500365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e81b05e817a192ac0916203b755648d048643a318fd7729fc0c62eb9d843b4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCADI1795265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373f4595fc367cc6af9e1e0736a0c94de80195ecb32d7faf97fa0af0a7f8b2cb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADL1826091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76d8a56eaeed319583bffa5016baa7ee796b409dbb82c14c6276df3449b0e5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:10Z), 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/USUYG1205310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504985db4703268319c51aa92b2a3bf88d991a12f6d5f95493d0871591f703e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUYG1206286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fb10101fc56c693044841f2812807b3991454ef47fa24f8f2d3fba164a811b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:31Z), 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/USUYG1206290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38fa18cefd06950915ab0251bdb72abf4ebdfb6aa58620d9645959d701787e0. 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/USUYG1206296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64c492829208169e6a1de2c9dc587f603a3f6753c1b7a7f38f54867f91e10c7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USUYG1442493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae71623924203692e5db7510b8dd7ca208b4a4b76ad13ed998d5c26fed8caa6a. 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/QZW9M2206165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe0e04fee769c5f3b17f27baad91e1afcb5148bf3e761014dddbdd68f34b2ae. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZGLM2391139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de65a09e5c392bcdcb7491688db252df29573cfa97554518ee1c480fa224cb. 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/TCADK1756958.