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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 0x621e8ae76fcd7a21d8e553f8c6c1d22ad313161a072bbbb8e42f6dc4375337d2. 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/76582de5-3a8b-4c7e-a8d5-304681658ac5.json and https://artists.proofprofile.net/proofs/artist/76582de5-3a8b-4c7e-a8d5-304681658ac5.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 0x428d7d3fa149a7b7714c1361cf42ea96f4ee4c5ceb73f5eb8e5d6fecda4d8041. 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/ZAE222000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeef74040b71cac6819c40bd20b8b50d24da9c8d48128b0db08e6ab26a31ba8. 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/ZAE222000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181961cf2db5c037a86ab518df26bd876138a1f456d5692c0efa3aa3eeab4e1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:56:35Z), 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/ZAE222000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b12767c29b6dc6eb626cfde1bfbbf6f49787f21acb6354f047ebd56aa679df. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ZAE222000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c9b078afd19ffd6411f5405b40914f6a54a4e622c98055ff112a379e737e8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:54Z), 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/ZAE222000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf500911644b05a3d48bebdbc4ebad147c3e18e443638c49c7df361d70fd691. 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/ZAE222000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15dcb13aae59b574c3d01f7484f28a8c32a33dc51c71121ab9aee880e418ca. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ZAE222000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e709ba1e5cc4072882d8edbab006389955f0b102b1ea89f5b6e17f638005094. 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/ZAE222000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2d638ff2d441766def9640a3bbf06c455332028aecbd8ca69c67f5dac753f8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ZAE222000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a445a983ed2e2eb65832398cb570af8a13974392609aadef08e8aa4bbbab7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:34:59Z), 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/ZAE222000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f30ab04abb304d99c5b5e765754ff7c74c595b44aa0e5d53d7e30419cd98f64. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAE222000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0abd9a52e4a9d0171f3519c9c365939ea008887532928693d38a68210a7b25f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZAE222000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d6524ca9c930a46ae244faf7d64cb23adbd373fa2bbe1c7a8d9f1d8cf409cd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAE222000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c0536a96164fedb25ed994c21c3b917797d3c025e3d90286da86d42a1b4c9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZAE222000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b35ac2ca981c38581749827495efa2050b1fa011498c3e444f60bc092dae0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:46Z), 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/ZAE222501781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aefa280bd0bad40d3ec3390e2ad7bb41a0e19634218f40ed70a16badffbcbbf. 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/BRAPI1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d50e6fda30aa3413c0bc8dcce3795fcb712d3006c876edae4e35ec0ef6810a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ZAE222000001.
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