thumb|530x530px|Groove Collective at Celebrate Brooklyn Groove Collective is an American band. In 2007 they were nominated for a Grammy Award for Best Contemporary Jazz Album of the Year for the relea
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 0x040f21bb8e48f17ab77f3d498d29f9f620a9e37e6708459de1b92e3424faa3b5. 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/8b9df5a8-5b56-4a0b-8587-98ac5988822e.json and https://artists.proofprofile.net/proofs/artist/8b9df5a8-5b56-4a0b-8587-98ac5988822e.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 0x4100a7bc22a8cb6a437b3b3b32ce0985a2c33d7adb9533722efd4d1ed524f179. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USRE10101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f4821f062be2fb0a94480cc03112182995bbb177119f52cc650f6043914f0. 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/USRE10101415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aed8ae8606553692aea3aa8907f52bc1b4443092a7101fc701b8a7e27391e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USRE10101417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecfafa42dd5debce86c76a99f604fb1e62855c7354d68190629939aee4c117b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:04Z), 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/USGR19610017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5da5f698bbe2c1900d3abc92440fc829da0358a40cbe4bd1b77a9095626a4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:24Z), 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/USGR19610021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf022c84c7dbc745849dd0914f802caf685eb36f030211fc5f7c953caadf6e204. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USGR19610023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d2fe9c2f865972df7518218451f3c6fb477abd091ca95d40a42f1f629de31. 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/USA560558109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de3d6679793589eaaa9824e5eeab79a5105d52db69f01d8838ba4d4ac3046e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:43:53Z), 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/USA560558122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d59a18197d4c9af438737c1f86c4a1120d7d43d14a7f9f63e80d6c05a80d35c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA560558127.
Live At PS1 Warm Up, Brooklyn, Ny 7/2/05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892b41c12d447d34f12bced0f7835223f143855cb83992738f1cc6cba2615b4e. 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/USGR19610025.