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 0xe9a2202e95a1217baac64a4d96642f0ebb3959589c578ade46d43b0d36a002f8. 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/5c0ed053-5e78-476e-95a0-933e1418d2a0.json and https://artists.proofprofile.net/proofs/artist/5c0ed053-5e78-476e-95a0-933e1418d2a0.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 0xdf9796e46623d134184a882d9f8838bf6b48c66b825cf4a6c93fd021080aad18. 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/GBKQU1884666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c263a614b34529cb3b841cd5bb4d83cb6aaa2be9e7407b42754fb40c3cb3d4. 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/FR96X1931658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4068d8102dee7fe34e4cf06626f63288711ae29ffff0b2f3ea621f7fd898cac1. 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/FR2X42134205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed4b12e9e70f6542cad7c3868889dc766013a3806ea75d1e58ea1f0783f7ca2. 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/FR96X2243930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a7dda8214e808fab3136965dd2e6530f69ae5e8a104f64cc0c1d8749b31bf0. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR96X2243929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54217420fc1801fbcdce1789ecf2055435f914013d4143a4a84d98845d667dd6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FR96X2243931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153c3d865f346c422d77c5923b9dbf4066470d0d367faf72156b3205fd48c6a0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FRX452334511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35517dd8bfc856a7536f30053528a3d0467088b5dfdb98121fc00e1903782d63. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRX282355089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5fa1247f53084d730cbc3da07e4cea795b3c56670a15c0efd399a986b6fd99. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRDX62306490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64622669c78d6ad6a2e2b385099506a1845f046852be563480cf6a003f5889ff. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DGA0H2302629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ac9e64f67cc45f11901f9eec609377e60f8d70768571d33c508cc87774774d. 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/FRDX62400580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e5a8dd1684edebf1f88d9ce99c9e00fcc7c4b38467fa3a052dadd05d6135d7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FRDX62401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775341218e1bb17a1bb197fc5740f0774a0f5f6d236a92cb62f69fb19ee5208. 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/FRDX62401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80682bb4608ca9ce013358ead051b00723514b341ecd92fcb8ed3cb23e73b216. 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/FRX202415807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacf2c0152f504f7d527396a90932c8546c2fff53bc5161cd692f805dd154718. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA082481330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086c5b1aea08471bdf89064d1c989a7159be1aba498ab4d54373bc00c11ea95b. 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/GBLV62406549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf0fe6334b73a947b0bbf24e4eca87062c8e037990fcd116656ef05b804d92e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRDX62505760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfa33126a545bda94e2fa8e658f467f770f89ce086c007a9976228b80220dc1. 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/FRDX62505770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b3cca2edc532e78339234c3213cc5de36b8e61cd6103fd792aab69a610d41. 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/CH6542191229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1076bb142c186314fd96c3745509dde8526c7720937d6b13c209ba93d4408af1. 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/CH6542191230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c85f40adff18dce56d40d653166793edb9a6654c8cd7949251c6d864bfd859. 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/CH6542191231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e2cd441db2bc47d0d68d05e816cc939abdc9a5b5026f13492da6495b657c0. 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/CH6542191232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302768887fc3fe55ba2d68bb361a8f0981953a5c56ba58c95eeb07311ea08d7f. 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/DGA062030616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc72f07535eeba005359ca0162ded66a414c87af8546219429db6e492f42de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1904232.