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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33897610090c8fa186b64b40cda8d47b4f12cda077bd75ddd65f6d297bcad69d. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b210ae2-ae51-4a40-83f4-c03aced68040.json and https://artists.proofprofile.net/proofs/artist/0b210ae2-ae51-4a40-83f4-c03aced68040.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077a6c8895fe7ad3e611dff1389c5330132b28f61f7acf45073ce1b632fec561. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRR642301936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cc60d10aeb9bec5b5042d7c44085f7a4b7101217617e014dccc0e0832d20a2. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/FRR642401216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c7aabe426c25ad9443b1946175eeb9535187ffd583462edd72bce22db87b1c. 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/FRR642401217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c740e9a1f5dd0c6a22cf10f51b1d1e09ce26e291404345244a3f003f7680a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRR642402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d234c8b446e06443d8425bc5db64449932d021cc7fc97df3b4705fe414c169. 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/FRR642500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d13bd6ec98a0aae55bdca7c9a4360e2281fc59770a58d4cdb361c7ce778741. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRR642500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09695c1501cd12d78973c5116b55acbb0995cccf539d96b27999a6e6250f858. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRR642500507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c740e9a1f5dd0c6a22cf10f51b1d1e09ce26e291404345244a3f003f7680a. 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/FRR642402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3c4c75277fb1dbb200a98c827a1c254d5179ce6aa15b179edf2d0ed4d8f0d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRR642500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d2a50659ae772711ca3ec256e0b9a23f4e5a1ee3c9aa8c38c1f9fa5bb4cf1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FRR642500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f77ab64d8285d46cc46e78755cb96b96ba8ccbe50402075700cf1599ee8f4c0. 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/FRR642500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cba3b0f6297429aaec2987e4a120a5e8aab4e2627ef1e3641dfc2882ac4dd2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRR642501539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b37c4cea246d637fd10411cc1fc2858fbdd71e500224b4ca4147d86c6caf48. 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/FRR642301707.