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 0x0dd6595b7430ab049ed56c3725c3fdd37a1da43428344c0bb16702ee29057078. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9711351-8427-4a7e-bbd3-c663caa2e2f5.json and https://artists.proofprofile.net/proofs/artist/c9711351-8427-4a7e-bbd3-c663caa2e2f5.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 0x228f837a6b9df5c96bc19dd0baa7586edc640484b17c8f71a1f22cb2a0e4325d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZW9L2366526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fbbb9947aa9121f9882ff0ce7acfbc027e90c39fb5db24f4f6eef72fbc9c6b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9L2372028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e805fded6201a99bdb15469fd10209ee3aa357582750c6d0e74f5da0c1082ac. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:19Z), 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/QZW9L2372030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec908fde9419326a057a1561a999d8d90d63995512f7f70a003abbc2d5eeec0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:45:30Z), 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/QZW9L2372034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eb35749c99ea23cace4f7de1b797459e04837b4a9f128fb57eee33b8170f4a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9M2306431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae01bd02013a42f0d1a48be303a75da72e0f9968151d63ed084d0735061e5f5. 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/QZGLS2473786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016400c28178af519206d0451aea8107b8c3d4107938efafb80c924b1da6b7d3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZGLS2473787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7f9506eb9b1ab0b0619f17d73aee6722a5c64f508145d4279777560819e641. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMZ92428514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15cbff38e91d3716c1f1a94aa91ba2558c14d28704f9931785cf9ba29a1308b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTPX2416796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10489c8e04b135912a9416f370c9dad16fe65a6ba21e3c2da513ec1570092007. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTPX2454860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8665d1c7b879d0a62a7656bbae2d7f40560737892b2d5e2efef3cd44405196. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMZ92567631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d10bf38a5dd9dfc65eb9a2fc965753fb98f65e1016e8854bc4bebbf5911f01. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:53Z), 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/QZMZ92567632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaabedb6600a187966f34b433b986871eed9bce87aedce4f42e243f1dbcbc922. 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/QZMZ92567648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab8a616059adea840d05d03fa90f313de5ceb2d3c65f3dd76f8acb7b16dae50. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZTPX2569317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0e197cbafad22b5bc3cc1816b82144a3e055bbbdb4fbb8d5f611717adf54e. 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/QZTPX2569328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bee6bb2e0a12a4063c6a727f26a49ad29e2a4ce016765bbc179f72ab0748014. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:02:58Z), 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/QZTPX2569333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19652f49fff058ccdaa10494239e36f7d491873a4dea655786648ed46cfd74c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FD2535249.