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 0xf9d274ada2e37a7f461751343cc0a2932ca5ee44610cf3dfd4df5f6ba10c0247. 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/820d250e-8e23-45f2-ba35-d62f00f596eb.json and https://artists.proofprofile.net/proofs/artist/820d250e-8e23-45f2-ba35-d62f00f596eb.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 0xa4d64a2830424d0bc0624839ad3c6753dad5e66c35b5bc33413fc1c41b8eefae. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:06:17Z), 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/QZVEM2397653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266b4ab6ea3e64c5f145bd197cca6c6a4acdba191211a521df85b8b1c1ab234. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:03Z), 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/QZPEW2403729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8cca35144668e0d18601b432f2a346eebf61ee1e956bd7c3b25a9bb3a18e82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2482693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0894f6d37e884868874f1a2b167dd50cd48d7f75310f513db87f85ea408030a. 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/QZPEW2414989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9379148ced0091aac038104af57566ec951c57b1b03ea8e9d3c9ce6da3a69b83. 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/GXBDT2371349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d282be35bea164139d9f1e32c4e2eb17f7a54332a8a87986fefa875432fb297. 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/QZMHN2477424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cb12f393cb3b04abaffb894894e978b337eed0f35b69c20f92e273dba9d2d8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:18:02Z), 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/US3DF2498637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a09cbafdddf107012b888fdd2b804ca2d9c8fca41157a0a43d010f7d4d0c9c4. 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/US3DF2454980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9c53f193f38e9a258e167e358586caf8bcc9e08cdc4177d996b10eb92e2bc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:07Z), 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/USANG2480912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f37cde2c39a590f75b4f332b39720e3c8054e38793e7259ad3fee5bcc56a83. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:30Z), 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/GX89G2577750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0323dc4e6ce6a49e2a806891777fcb9690d32a6374204185ee2aea2f59592788. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LE2581822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eaf5098ab1315ec9fabf50984f40b91c1b4a3a0ccc5a3cdab18c7e1c9055de. 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/GX8LE2564992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ff2a0b1bdb45c47816782670fb02b58647233cb530db4413d704a46b614fe. 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/GX3HH2539407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025ac148bbdbb313f3cfa47b292eba0e3d785c253e3f4c42089545a6235880d. 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/US3DF2552992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d80444406906d6d1e5dc90318754505f4cd3a5b7259a730b7245de844f6b77. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX3HH2537047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd8f270fe378ac953adf96422a1f43f63ef60befbbb814bf5ea8d78a14208c. 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/DEH742516915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688181fcfe7c790a3b55ea8b37e5221bee9d5938069bedbce8b2752584900d2b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GX5MX2528619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28435fc32f984b332d9a3226a5fee64bf1610ee41d21444ee4ecc6bffaed1d22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXF972594041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f673892540b6e1503dc5b336409ab5aeabc7173f251915de6b79a18809425a8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXBDS2506640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9aa1bd57a367f635c6df1507bda7b1a560bfdca5fdb726acc8b294bbcc9b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXESV2531768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d355e5f7f73517e4a50642a9061e46bb69eb25236655e6e920b0e53167278. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOPTR2537010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52652b56064f049cc6944537ef057ecd83a9bc090c46da81eb5e1045d7ea5a47. 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/QZVEM2523665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b831182db818d8c31a7c009cde316e1af09eaf7660e0cea171235b26c37802d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX38U2522116.