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 0x978f361623ca66d047348b65174129f77b92466f989483cfc446396d7e82c543. 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/5c9ba0ac-f691-44d3-b22c-84fa2df8b887.json and https://artists.proofprofile.net/proofs/artist/5c9ba0ac-f691-44d3-b22c-84fa2df8b887.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 0xda60fb13b0921d4c1f2d489d9dbb4628f340c26ac55f3d3415bc493e54ec65c1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DELJ81814953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ba518cbbf8898dd1236fb77d30dbec8b4a66cf29bfb75d54830359904ddf7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DELJ81814956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb24c07cf89620fb79bc4c0dab2553f5cb81a1d14380293fbfd0fe3256fb03fd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DELJ81814957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc8533df389e7c351d8d03fdedc91b39148a0251194fc887f2081841fdb19f. 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/DELJ81814964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67977cdf3f22bc23f75159785b1da8c7d76bfdadd915d05ee9a727fbb04382. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DELJ81814965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9eb15e6e9fa31afff923266e352a498fa5babc960cea946b92cf21b0cbd74d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DELJ81814966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec230b051c4aa342e2bf90bab58460dcbe65f8c2a5d96cca0656487fadacfdc. 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/DELJ82086632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1829b93782c1f0a28e6f1f9615219668a41503fbeca45586ff03210ccdf885a1. 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/DELJ82086634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e95bff89eb4eedf5bc2d5f9e736f106dcb05569250e0ba5bc0ebdc3d5d858f. 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/DELJ82086644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec0a6583fbee3f73924ea9598fa1669fa93ac8b39f5f1953a737bc6eb8cb65. 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/DELJ82070516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66edb2b95e3725f1432f161c9eb3fe898d6f12554cdf3f6fd8e6823ae668c32. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DELJ82070517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c46bceae22704f2c4f79ba67c872501c71e9a4f6d32a431f380a7f6978b433. 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/DELJ82070518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7526ea3d5baf95c0fd5757d1222614ae252f5454ea409cf6abfc0e80597c53. 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/DELJ82070519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784862d581ac3e23ed8d6016cbc8e8e7dfafd80d62fd0a20921a8a920c790ebb. 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/DELJ82070520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b58d8d7068c379d2d62d33e30fd687e53b7aeee3b73737c45d771189dc801c7. 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/DELJ82070521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49544a616d51de27a4cb520015c507d47ab1e97a9ba3de01e5f7944650aa80b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELJ82070522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f36631961afae3ff157a67227f0acbdc5ffc65f408aa822edb89acad05965d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEZC62035185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa9f3644f40d4335174c760466d359a097db6f2ddd5451f508d32899c29476. 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/DEZC62186577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2a7dc6d3b8169bd9902f279e88cea0db3ec199390d6c12bedad4da20234203. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEZC62186581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6140a91f5738aab23c819afb2fabe23929805da7600a4515d4eff3cbf8534da. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZC62186583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5b0aaba8b6ba920b07ad4316832934bddd2bb865f7de87c683c67c3c4093a5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62186585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb852f23d4a441fdd64d0a29f22b071804a48ff8a62e97f4c9f826e2f349b0c18. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZC62186589.