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 0xac4c5fd4801dcd111ce1617e4b1aac3133e3eb08a860203bf4848c3589eaadf0. 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/57bad5ad-28f7-4975-a7b0-a507dc0a3592.json and https://artists.proofprofile.net/proofs/artist/57bad5ad-28f7-4975-a7b0-a507dc0a3592.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 0xa7ef32a600a288efa2c8f45157ba375daa8b807a696f0bb7eb0c72eaaba73760. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5AJ2202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8465230228231730d338a4ce9b4f717924e3b6b7e8ffd5fd37449ab261a3edc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ff23f1b0ae975c162b61ba64d736342372b6fe9f3b6a3e9848f1fbcaf7145. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5AJ2202005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db712d2b0697d37b6cdea4f07f858ef2f421572c08b3e801db1d74835ec64b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5AJ2202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608f0f05b9b6f09f10eb24d32cd4db7a92049d79df32130069c4ecf0301b3d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa8554d8dc559676314d2474ff59a2455b42410f8f54a306309e74e4057e343. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1bbaf7ec422ea38abda784425ed517d78b04afea14adda489f691a7e4c5837. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0635577c4279ed083d2223b1219c5962fd0e346baeb6cf7c6298e761b02d6147. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07ea27fb595923e75a930631f2a6ec30fa8dcd2b05ff5438342e74f1212bec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5AJ2202011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c52996987692fab8641c59182c5d2d7228551a3d6eafbcbae4a196d58e1bb0b. 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/SE5AJ2202012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff1045b374ba27986e491f20f2f8706ceafce686ee5c0574bc72dd82b4a33f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE5AJ2202013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc2f89907eff62abcc26033284c898afac0dac0ebc4722535463f863c128e4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc25f4a7e75be179428da48a2314e00a8eec0e5266749e8061f3f8c226cd54e. 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/SE5AJ2202015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d32ac8b983166ac9b5001ffd54c8cf1ab7d735897d96de6335a1b9f1fc7efa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ2202016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e54f3c09975626127c7142b02d80e2854d4cee96c553975855e2c0f721e8087. 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/SE5AJ1900791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd294d5855d5ba39d04a0f2bb1c5161f15d5dd50c5ee898af7de3064cef9261c6. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:51Z), 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/SE5AJ1900792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f7925a9289541f5c09b6b28403cf122130ad6e0d11d7996274631a0ffd9fec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5AJ1900793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88f24ae657d842ca7379a661a7c42c13ee7e7b3b906cee45bc76137a32d1cfc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:26Z), 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/SE5AJ1900794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6979d85941352b7018d938711f474a663c3664286c6f39fe293693b8fcf676. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5AJ1900796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09069542c3b26a0dcb7a1f657403213f596081bb390236f6b5ac7de766b541. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5AJ1900798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34649bfd6bd6d44c26f767b13a115163c558850f741b10bdc830b3dc2f3972f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:16:44Z), 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/SE5AJ1900799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83602d9726f0fc2d562e95d89b85d02b8c33ee02fea5cf29254ddec23ab68b64. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5AJ1900800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020adceeb063cbbe2f367e22ad3f1c26bca5029640c39558b5b53838dbd103f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be45e65189ec22d9a29480cb1f852953e0b032af3a7c747e3bd11e1865c3c5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5AJ1600266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6662efafa8d46c56b136d2011b92404f610bb2dfe4a52997908da10b714035. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d241698a3ba7424fdf283eacc3edd66be65c3b33ce00bb46684323446be5201. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd34bbbc2c43cd1a8a2a57cb3149768e75575caf6f64bdd573d799bafc79664. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6750d6c69053999318e27f25ffe66010c2403a664f8e7e09c8ff98259d68bd16. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5AJ1600270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a69e5e6168ed1e5536eedaaf5b78b6e6d145879ac9ee130c874e10c9a3daf7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a718a14f37c47cbc92c733cc8906ee9a6520cd9296e5a8e41a46962edf86506. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1600272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde10f8d2f95f60be6a5b13001225d781842a16202f4a28fb0635848035bd386. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5AJ1600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118af3d54b2346f733628cae439f9df97d39d0b862ef915c895155284d28dc37. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5AJ1600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ff23f1b0ae975c162b61ba64d736342372b6fe9f3b6a3e9848f1fbcaf7145. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5AJ2202005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1308c0e69daef13634262e7c17ad2d3225b05aa105be5589abcce4165ce1c4d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1800590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab735daa4bc1e20571fc81e556c35a4261eecf0a82431d072a23b683d204b03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5AJ1800591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb5d01b4b4fbbabe00bf20a13d0fab9fc06be3e177b3b3f9ba6e95ca61b41c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5AJ1800592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42b196daef9836f945b6cb66b63e2862567f76235881368124b54e5980c141b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5AJ1800593.