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 0x79110f94e3bd428e5214e5f88918c40b78e0a15bfb40215f5781b3ea8080c1c5. 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/1e356aaf-496a-4c7a-bb94-ed5af2cc1539.json and https://artists.proofprofile.net/proofs/artist/1e356aaf-496a-4c7a-bb94-ed5af2cc1539.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 0xa7bea7e10e88401da0d724c8f0e1d19d4f71eea3bfa676e95ea7fd57ed19fcf9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QM2PV1654600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb542a0116a6dd9fd4996b8efbccf5ee418c2e4aee919e5024c71a1028ab32f4. 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/QM2PV1654602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7f25ecb0c00d7c9d07d74808f86456425df2b112af77d436553e4cdd84124. 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/QM2PV1654606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa428e666a6993b70f53d57e4b5374ea850443a9bbc77bb7c0c8e610627ae4fcf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:01Z), 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/QM2PV1654607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1409de427e42cfb3f1dd681457828b072c74ecc1f9f9be7b164c6a7ac55c3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZANL1759877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce02545e73e55b057a184db4e54ba0a460b0f03fe8fc916221db764b6a6daa. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZANL1759880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2b7ec7d1f06dbaea0b79ce3305b334f9625ac48a296e7a080165b0d021d78. 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/QZANL1759881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b1c0baa2164d657260eb1ddda8cf38bd08702fd8a91184453df5580ed1dc3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZANL1759886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc878e1ac521b099c83a6f69e65529cbaaa1181f55cddaa471f4442661c1c5a6. 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/QZFYW1979420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0215f1b1fb47da454f0f13b83ae7b78b5af0639750a011a307969fc261112e. 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/QZFYW1979421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef566b6dccdea007296ce5718d7257ce0e28b6c5d3f8491a5d340c487ba01a62. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZHN82054836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fd68fdc340b7151cbc86701e73f4d3ebdeac223b993b3157b5f8ccde487249. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:10Z), 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/QZHN82054844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c23f3f6777cfa27e6d7e08766811797e471b6a2a98211ca080035914813d363. 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/QZK6F2163776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259c3204ed0ed0b82763a9141939b054c2804ec1e7135abec8576ae1006d837. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWW2104730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecea411ca2bd4eedc45877b8de0f75c2d30077701a449ed1f4343480117b0de. 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/QZNWW2104732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa90e4f758ab92dd1dcb2fd304a71e9936d1a3f50a3d64f27491c0906a58e65. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBF2436165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5c1c05198560aa152329f2db6cd503c93a3944a63d4dd7c798f5367f76512d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZWFL2444032.