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 0x448a345597982af81792ed952767b28058e3ce2dedd9c45798fa8cac133d7188. 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/59d7e4ff-fb17-4b94-af99-6e56373ec785.json and https://artists.proofprofile.net/proofs/artist/59d7e4ff-fb17-4b94-af99-6e56373ec785.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 0x978b7a9bb3a07e77be43114593213467ff37715a188d1ce4ca28359c7abb1fee. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMAAK1579875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a42930b751352da93e49b6d417c28b4c340ddf832b79583a65ebe3d43efed5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:04Z), 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/QMAAK1579880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3f7d79e82c852878dab26594f0a06687784c9341dc4b9c4116a901e1e1f870. 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/QMAAK1579882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984df367ed0acf1ee52577092b8deb4788545da416374df6a147829f7dfe640. 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/TCADO1843210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea0273e15136333f4d49c7aefcf5ce1d2d13dfd66e3f4e140ce6ea3e0e0b53. 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/TCAEW2016517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14f5d7ee20d3f2a798276c7ee857eccaf4cf8446dcdd3d7f1aeaa85b4c4165e. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAEW2016522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2d81f1a124830c6a23ea29a9ceacf7e5173500a8ef356779512a8a91f16dee. 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/TCAEW2016529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400e1f706494fc6b01afce4675c09995fa08ade3411af1318aaa4120df6c3c9. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:56Z), 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/TCAEW2016532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8498bf0abd3a8b10bbe76ac8e96182b528decc1ff83d2f4265c3ea35bdf4470c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAGG2260971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4ffcee42f654a08f0d531d9b9c713e5e8d29c0f4470fb492b318d8f4eeba30. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAGG2260981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f50e40e8308557db6d7dc8796c8c4a16d7abc0fd16d456b90da7b9b788a2953. 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/TCAGG2260984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de5bbf1546dc4f3a596d917e2e14575e101d78ce678c54f4a4e00ec065a62f. 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/TCAGG2260988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa083293e606dd4f242b84c9ce82c96a69cc12a8b34ce04c0d1a95e88578b8b7e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:46Z), 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/TCAGG2261006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a34e8972165853ff3a0f3adfc0bb1e0ef06ecc7eb36b6cf8e8c23ff9cb986. 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/TCAGG2261011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9500d726b0d46d5490f5000d8fa23d4596382877aa4c91cfc8b33ecddd3baee7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAGG2261014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fbdb9953f071d1b4e0aafaffb3c418b1d308dc41cdad857e0e07c06eda7ac0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGD2247396.