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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec16c6ca8e607f8ab37c8e0129120dd19c358f99c602ac6cbf2d19dfd460c3. 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/2e4741f3-ef87-4c51-9c72-7d6764468f7f.json and https://artists.proofprofile.net/proofs/artist/2e4741f3-ef87-4c51-9c72-7d6764468f7f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d468aeab7561b8ea7329a96f5856036d3767cb1e15edf69d0b104ca52a18f29. 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/QZNWV2162121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2648391610e311863fc4a4467b5258a1e4d6e23408db55edd69336213cae7f. 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/QZNWX2196441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3ae426d52f995f2a667cb33744107512f7b145927c4a4c54b505c78c29ce32. 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/QZK6K2227367.
Palomitas de Maíz Cumbia Sonidera/Sonido Pirata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290feaebe8f2b4dcaff294b6a1d309d8e56124545f96e5f247fa2fbbf44167cb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES31E2403205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b229311a8217bc8d99f2c052a2d046b727fbe753f3740766dcc5d04157db09. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZGLS2370651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb060b59b1607d75b7345abebd0f64881cffcd1743f8cbd3fc9e3656f5405ae5d. 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/QZGLS2370657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ec7937742fdf34d5a13ac8879e98d1b915fd589a3309db615e1579d6bdb5b. 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/QZGLS2370652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf8e4b58b385d993883370ad5b1ed55831e25b9d27c6b106bf077e86ddbe396. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGLS2370656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b170cb9ae8356263d1bd9072bb6358add54a2859ddb34ba179c7b6eb083141a. 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/QZGLS2370661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3282811f09596010e0540d536f8e8d3ad7dda56f8769d3de39b5b09e27f29feb. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZGLS2370663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d9b7e381cf2932eaa6b793cfc9d3b03c1bfab2cc4bf0b95db5a5cb97f604b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZGLS2370668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6f74b33476d049d6679f480cc613b22db6e0dd17d3f3101623447efd504900. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USL4Q2537023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98c304a2336c347af345008aa6806fe8bec3052aa4374e2b5eed8ebc973f13b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q2537024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28e482ce5f33ec214de0c731f5172efec1f187f71a19455b39b6d4061d826a. 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/USL4Q2537025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6093a894b9755e2f41f64b9fbd6184a3ece1f70ffa0ff0778398c518953e94e6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USL4Q2537026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1f3e1715508cf278f0015a578fb2a605b87bf0646153dd58609f098eab55f. 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/USL4Q2537027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263eaa2560c3d4438666c5ddaababb6b17116349410459eb587465c152ace24c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q2537028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12359827713ffefbf06f9378337e2dc2c45e35d0b2325f346232d8f74942a523. 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/USL4Q2537029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd31e643df04628333b1ee51a3afadbda6ff7e60614bf945b8777f88ded8dce. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USL4Q2537031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6800dd2731d01ceb2a171d8411f3cd11107ab491584b09772b287935f57e87df. 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/USL4Q2537032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47d6cf0a7c462aa7af704cecd22b341e561e4265cf82b58f75e3f9779dacd95. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USL4Q2537033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf628751a2dd38ad7d3a8bfd49c851b1f1937130ed940018723839b44779347e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USL4Q2537034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e913c07f5e8e801e043144c69f321615028737cb94eeb56c8e387187cf4ca40. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USL4Q2537036.