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 0xb93cb45e4ee312b175990889a56803f1a4682584588437c311004cf7d549817f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2ea58f7-b114-4491-9926-6693205d6d49.json and https://artists.proofprofile.net/proofs/artist/a2ea58f7-b114-4491-9926-6693205d6d49.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 0x61fda59321a4f3e29aa0229f8d60e3efc00a2c1d87ba6533fe4ce4fd9c0f1d48. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:11:37Z), 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/QZES72198933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21dd79a1f27f0a8c7d43705e4ad46fb1be943f2edf5c5aa31147b41293e70df. 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/QZK6L2345373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f56e31a4de6c796e9b9a25d07ceeb673bebdb8d8835427526aebc249df16032. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:49:07Z), 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/QZTAT2488803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d15c906b7e1458c67437839941239ce61f4614e9e61089fddabd61e8c0c57d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZWFP2461007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3d1bca7d37292f0c417beda31c395618316ed8e2757bb38ccf0aefef657b01. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:08Z), 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/QZWFP2461009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea977afd15108bbe55ba1c6c364af48f009dcefa03451d66c53068a7bb1073. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:56Z), 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/QZWFP2461010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc938e83a683ae91e8add582759a98332ac76cfe198949b3f389abaeeb03bd6d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTB52449186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a7dbd05a00ca4437b984e188577ccae1c137d99acd462402e5173a24ff34e4. 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/QZWFP2461011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49e57e2a7fa0e101fa7cab82936f7477f5488505800b4e4c03b8259acc0a33. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:02:40Z), 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/QZWFP2461012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816bba398ee9f0b73170c2ee065cda6db2f4e51ac16aa59f89dd8795505ce7d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:25Z), 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/QZTBC2496329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c65d2a8258307d215d9dc459c70792d75037e24f0cb400b0b295306f223fd6f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTB52435654.