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 0x142ac1476e67f15b665d6abdd40a38c37e237c5f11d5ac17a3c3dfe83baedb8c. 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/9591678b-96bc-49d2-87d7-89d7e77cbe34.json and https://artists.proofprofile.net/proofs/artist/9591678b-96bc-49d2-87d7-89d7e77cbe34.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 0x88980b8a3011730a34f4f6841015531c317363c8fee38642efeb2f9456e3e1d6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:43Z), 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/QZWFF2401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00c48f506c8d4bf2a0a752fbb3810ec16116e02417db1ab4b2f18e0c6b5f9ac. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:12Z), 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/QZWFF2401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5744f7a46bfa4ee91e024c5fa5711d20d72201ca38e46675636270c1fd2d0c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:28Z), 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/QZWFF2401079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0629daa7214d9282a991d68d459e262a1fd7334e8340866983b1d451eaadd09. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:12Z), 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/QZWFF2401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435b60ae2932134e30a52880dc01c30c435f1b5a48bb88e713906bf524be53c3. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFF2401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9add4f4651be5bcc52ba2c1a33c4ab94cf6150be607c0394b2d00841ec624f34. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:15Z), 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/QZWFF2401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81883ec34b5c6787307e19d5bcb559b7e583b303126c13424e6b7af6b5f3c97. 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/QZWFF2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64822a1d7194e38dc134626093af9ea95603d90e985aafbbaf2c66ccba8142a7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:45:29Z), 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/QZWFF2401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09d004cdbfdf70b7a86b4923cbe3470e850391fa3951118e8a4ec1eca4eb996. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2401062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f0163f3cacd25e3ab55646ee5a3608fb7ac23dbad786cdcb0b8580186e96ea. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:35Z), 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/QZWFF2401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d28aed9382c3a3ad161a0fd414d675f05e0d0c1c27e5cdf47ac376f988ffe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFG2402665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160dab3207d3dc0b194348a63468bee05ab7f11c127ff4325453b69ab51b6b9a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:34:22Z), 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/QZWFF2401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13ae9aa9a2a438ae1145dc8963dd1abd88bf30576818c6a5083b274b6a481e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFF2401048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3eb03e3e607398e98a8cc4dde475b0b0587afaff1a33088b36c5f2c1704a6a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFF2401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4bd3dc2c44efbfca7e31ae1d047eaa7559dc042e4b2951220b646828f5e077. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZWFF2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb1012f9970e5aac25fdd83a210bca516589806ceb22cb24bbfb6330bc362d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2417915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb3a2a5ea22293de55a34c5b9545e451a7bd93228893c9dda4302ad4655537. 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/QZWFF2401051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71dfd1256c6170408b5ec56afe51e1cd28d98330634c23370aed0756329d898. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFF2401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282fb9b7d546c7e847e254bea4fd571ebfb381c0c14516be7e6cb978ff5db8f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFF2401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d28aed9382c3a3ad161a0fd414d675f05e0d0c1c27e5cdf47ac376f988ffe. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFG2402665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4113ca0ca7ba835b1b6c50bdd40a77b0dc897a24cc16480653c9c17e2cbac. 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/QZWFQ2462911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e3f2eedd1f8d15d4618138dc8cdf01c1a6159cb1b250893c82bc063f91c34. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2457723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c43bee32a686f74f02044f3eb9a64530b13c7ae77e47f8b6f57199fb07a92. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:58Z), 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/QZWFS2457735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454b4dfbf89c4975c7d56fea1e9cdf0bbdfd97d5f0799516dacc0cb7254ca61. 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/QZWFS2457739.