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 0xdc427658075c2bec88b8e96bdf0f65517aff16281663df7abadb6403aaad75bf. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e116d88e-7d1e-4686-83cf-2ab585dbf659.json and https://artists.proofprofile.net/proofs/artist/e116d88e-7d1e-4686-83cf-2ab585dbf659.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 0x366d21310b2c3b90f81aa62cf4b969a50093ba865243b7a6e3e311a2ec525379. 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/QM6N22290273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72676dbbb0942a3d180d2fc6de4c0db99bd437fb4e0f4a34e7de524326ff817. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62112206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f787ba3276176d079fe96da98f8abd72c9771aa38168364363a1b699e1d481. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TW2265289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3dbe22de509c08a650a4b9517fc6b4952979e741ea3e53f57a9333ad5a5a7b. 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/USF289998006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6738a81a9058c4df0cd550ff205a4ffafc5e5ed2789951bc3df02ec042c651. 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/TCAEB1937772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92ef9d0df67c7d4fdf1e9c293d05bc557ee8179a739af94b90778b523d18769. 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/TCAEB1937778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43918f8d16a641fd3ad624e04e5037695297ed677fcc70260fc49ba76512598. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEB1937782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba858f2c8dec1d37582cd0e4af4cc2dcafd882a9167e4eb46cdf0225b994b8ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACJ1543952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca488c162db1422bf3245ae64d0427fbd97f156178d3d56597ccd540701e27. 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/TCACJ1543958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1278408772faf3277fbf969d02e46f713b42d300482dbbdd00ab0daaf9b2f36e. 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/TCAII2428706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d1d55ca81ce0b518985ea73ed4dbb9b6102ed7dceb660d963d7baa5a2f6133. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHZ2430407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349c81b69e1e59a7050519481c3c75b574799a1d89fc4ce789d8fc1c3c7dd52. 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/TCAHS2303338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dc6e8e8116c4af0bdda20d2fbb1c0712a4259c2c485bc8da916064e81d05fd. 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/TCAHP2305184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05bdc4b4f6d3b39d1d1a2dfd99f5b6032bfbdeea6c8aae07819136de4cf0482. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAIB2467463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367544d048ff3c1515784d89075c2be36318172fb4ae915d307a2724d236cf19. 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/TCAIB2467515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d1d55ca81ce0b518985ea73ed4dbb9b6102ed7dceb660d963d7baa5a2f6133. 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/TCAHZ2430407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349c81b69e1e59a7050519481c3c75b574799a1d89fc4ce789d8fc1c3c7dd52. 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/TCAHS2303338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dc6e8e8116c4af0bdda20d2fbb1c0712a4259c2c485bc8da916064e81d05fd. 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/TCAHP2305184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda133f26e9c9b4a7419eb27d5fe33b490aafd4eb57f376f9b6c224c55551196f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAJS2553301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe03007cf75d37b5fd32ef86b130cccf8714d3693464aa41dd8a01327e12e1. 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/TCAJJ2510322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e5552deaded8ff86b94dddb7e7cad8e3d4a765751a1d76267ce8ee79c2fea4. 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/TCAJC2468726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244ed20dd1fa8d8426bffcef7a312bad95ed1b41c3ad6ae05a9e6d886bd5e8ae. 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/TCAIY2437045.