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 0x6422d4ae73bf35fd68af23d22dd7483c854a1215e74702f51555ef693acf92de. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd773ef3-78e4-401d-9684-4e45b2aaef5c.json and https://artists.proofprofile.net/proofs/artist/dd773ef3-78e4-401d-9684-4e45b2aaef5c.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 0x73238ca28ea38ad05a597112badacf51946ca915c31fbc32613ef622d26cb293. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CA5KR2221135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fbab1f1b71cf7c5d13a3923f4a637fb63ef4c9649ea53738e4000c495aede8. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CA5KR2221137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578aef1dd609f7cffb2b04750c5a3a7f2c550c92a729a15c72c8f587e8f3c336. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2306223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0edb91a1f58ac7d4784163e622c4fcce73ee35ef28eb4b83c0a4267ced597. 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/CA5KR2362767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9990da18507ce39ca6195aa177e1d82230257123fb6f248c64cdcf14d9a78. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CA5KR2362769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c2e20179a8c247f78b2a8bd794573ebb044b03c9520ffbeba2d0bf909ea1fe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2452246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcfab3d124c640112aeb7b5c1c5d473312e379eabc99909c11217da39aa192. 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/CA5KR2481873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b49e8519260aef5f162f45c91636de9e99882a1b8a7584dc7d0988e2a0929e8. 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/CA5KR2500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9e310f2f8311d489d27f0c0b4131af61fbb0df42caedae195b5354d2a2a8a2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2501996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52ce0f3390526d368db54d8d4357f1c0a3932b8418d290b6a320f865f4a875. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2501997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8052437adf9de9d7e62b9b6881b0f068565f0cb34256cff8b914afbefb0c68. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA5KR2501998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351bbd0b8fc4b434a8ab73a5dbfe2367d7650c46c15e00d38baf58d3f28d2ed. 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/CAQOI2512948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351bbd0b8fc4b434a8ab73a5dbfe2367d7650c46c15e00d38baf58d3f28d2ed. 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/CAQOI2512948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff2dd04d58494772f3f66936ade869256297125b071e79d1f2fe6381e867d48. 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/QZHN82129868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944e4d17d7ccdab04f670898f1f71fd474014b1b3d4ba93d55d8274003d5f43. 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/QZ5FN1910537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2707b55f60be32e058bbbd6d7bd2570851ed5dabe8356302a919124679ea6337. 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/CA5KR2501423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750bf60a224d2df7437eb37aea22ef3217beb0e5f9c1612c7e360a006b6e953a. 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/CA5KR2343590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c2e20179a8c247f78b2a8bd794573ebb044b03c9520ffbeba2d0bf909ea1fe. 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/CA5KR2452246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944e4d17d7ccdab04f670898f1f71fd474014b1b3d4ba93d55d8274003d5f43. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN1910537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d079551f742be8404f6e013f2d2e5171e1f6a75263d66d7f1cb7dd0db3db6f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2420256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aed459b7f14c8afbf151f129c18ebb253e917e85e52d44ec516e88a801518c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2293235.