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 0x21cd8daa9f69d5ea1549865251cf55974415cb93e2fab8740e1458d8bbdb5230. 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/40b6874a-851f-4f6f-92fb-38ed3ae004c9.json and https://artists.proofprofile.net/proofs/artist/40b6874a-851f-4f6f-92fb-38ed3ae004c9.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 0x4be6034144530170bf1470b6f9446cf17204597ac42a14d3e0516759915ad4d1. 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/GBKQU1138852.
New World Disorder - 23's Orchestra Dubstyle Extravaganza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c87637ca1831cb709dd4f66f564bc66b3eb63594cc191af3e8c254668e0fbb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USLZJ1139657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd752087a3b86d5e991151a173cc5e1ecb34e028a20f71af06645d93a0a30ec2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USLZJ1142094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8e6e43cd9ad46cd755b243879ba65f6543ef1ab63b882535892569d82852e. 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/USLZJ1142096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226801485d4141370f1d1e88e24145df91b50ebbe3781fb85ad773a7203059df. 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/USLZJ1142100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ee7d7166853a3660a2e7e9896e48f5fd696dbff324d4ae62e084afa3221d7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLZJ1143483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdc8fd63f3db457e0e149dcabd10634f14ba4fa4e92a1652369d163b25cc54a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLZJ1260820.
Into Nowhere (feat. CoMa) - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd13a2187dc6d729ca5fcda0b7b1df4031e4856df899cded2d21c3fad7e583c1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USLZJ1268571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998f1f9fb8d66646cb547c4b0a9af3fb1ac54a77dc5571b282c66517b86a26bb. 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/USLZJ1268572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b630ede2f25dd05c472798843d41ec5549b55a2fed29a0bf4d4b2e1680ee7f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USLZJ1411553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19ba84cf91e03df057a182ef926a0b89ec2404429371ece860dca069c5a639. 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/USLZJ1411554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b822a2e96ad378ae0f57a16263a5e0f0f13247b82dfb4dd326be222240657. 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/USLZJ1519809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf36f4b5669cf51e2e42f8f8896bd5cbaea61867a9b8a9781eedbd42008d12. 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/USLZJ1519811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2664ade9417fdaf86d72f9783b57e26c6d8481a7034710afa02397656ecad5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/USLZJ1519813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5418aa4ffd1fd8696cd17a90d1ba788e34f48bccf29b8bc844093c1e22e89e80. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USLZJ1519819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66674c1ed331958a74cf20d1a16220a46196bd81ffe9f6ffd4bc2f09306ba1a. 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/USLZJ1561858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040c3c01fa772e820813ea83671d2faf6567578492272f919f3740ab52615455. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZS1Z1608861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056c0914f5a9d74640d0fe34126414c038ba7441d1fb6cdbd0cd056039188b0. 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/QZ5FN1740065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e45635319e7cb4ca0a4f0a65340bbdf9450f17894bd3802d414f6e12a802a0. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZ5FN1740070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dfcf5393d85c334b3e785ebf2369c6c94e7cf13984e8ca6e9386020d3186db. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZ5FN1840202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571eea80661930fddb08b8482433f967142ec2fedbcb37b3c1069bb40a6a9e8a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBRKQ2037763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a7b6531f1b39b0dcf8712fd6043cc2285d81080470bcc5433fd180afacbcb. 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/GBWUL2129839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06520be93e0a0f84f324fa833b7a389d23fe21d859357d03d609fec3c464effe. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZ5FN2339041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40574a1e75d859ee4c68468d612aae63fb623f36f4c2c97c0033ab279d05511e. 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/QZWV32454938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf4d80906654ca79fcfe86c1a0446f78e7f65582a9f4fa734605aaf3b77441. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3GD1401573.