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 0x5a27359495d9f6a81bcab0e27bd4a16d42e986a397503b26f36d900231312a05. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a3083dd-ade7-4de8-8d41-4b826533f4f9.json and https://artists.proofprofile.net/proofs/artist/6a3083dd-ade7-4de8-8d41-4b826533f4f9.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 0x92fe31cf7b31633e0d13f2067a31fcb126eba218ed41406ca7f6ba9584b62c73. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/BXIV82397720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c092fbd2ed0a8372c72f3c81c7caabddd7bcecffa56f29b63059eea5bc72c41. 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/BXIV82354161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fd43367522df51796928d3bbdc780a19ca9167bd64eb88134fc44671db4e11. 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/BXIV82370038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376c4a632bd7e3782201c3942b7681ec47eb7c1c749d0862c8b3bdc295d8cc0. 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/BXIV82336273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f617380335f7282280b4ba8d8f565b56bf4a23127a94ca69009c5cfc103a267. 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/BXIV82441255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9429e450ad467b293aaf13ca8c61fa17fb698a7f56080a8a259a0020f29a37. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXIV82495392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd57490048afb34c847780a6f86e0c74499b3b8ea5227696f2f17a4da93a2e. 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/BXIV82440554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f88c4debeca1a89d3ffddb6d8885601d72f2fd37acf1305bfb6716ea86456. 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/BXIV82485679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261701740dfb79a238c4385a734bbbb16a4009a1582b2850431db7674e99bea. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ7P2482404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5426fe3cd8cf9b590a50fa55c76daab5bbb40d8175ff7cb2b15075e2b5cfa2b8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7P2482405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a4d16b129a2b547a9f04567ee372e1ce74600d00b619789a1c7c4c40a5a7d. 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/QZZ7P2482406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d0f545dd25bc4df8b64d6227d1eb9f1d430c965c98dfdec443a8bd2efa5ae. 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/QZZ7P2482407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f7e306b227a4196b5dea01879af7f4d908c8ffc13c3d00c7964ed777eeff3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7P2482408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b13f32e340dca5a47916974b0a5e0c4dd9ed00545fde27810cf8829f2abe7c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7P2482409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7ea903b15bfddd5cdb54b2912b0a54e9c21899d3d3fdf8fdaaf47a013793e. 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/QZZ7P2482410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cadce714b60ef8edbdb923126dd6e22762f2f5c2401c6cc720b836f2a9da10. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZZ7P2482411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a48341a1d49465d0517589b140613fad74cfec233c608265a7b6584451f8b9f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7P2482412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7205bf28927dec40c3e1a984507a9fc60e0a7c25e601d742aa5d14f31b3e4a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:16Z), 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/QZZ7P2482413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398bc70fe7a2b149aab6f4d99050e7a66c0010a113cf2a4a0d0e149715d087e4. 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/QZZ7P2482414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ded62ceeef72064298c97146861c01776ec64dab22d6d0f99cc12a4f80c14f. 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/QZZ7P2482415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366d3d6f116f40e6657b62ffeee7af41bdc4c7c1a0cae7a6eb8b1fe2ef10387. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7U2557976.