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 0x94f729725b05cac70d33af26bba7487d238476f7741ea7002ad1a901cad79eb2. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec3f597-b33d-412a-922a-5b73d9b61d43.json and https://artists.proofprofile.net/proofs/artist/bec3f597-b33d-412a-922a-5b73d9b61d43.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 0x9cf6ac13f27422bba29814757c4699ad04bfe1211073f7599db7f22ad5898531. 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/GBMA22184597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d47f83695e9958fd6ed7277f5cde8416ad371175d8b545b03d31772bc81f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX53U2082872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02edf608aaebe9c6bea01e02d88a7b5054e6df2899d4898233e49e2cb9ff507b. 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/GBLFP2278632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd992ad00b599fc225ae0cecb00e2c3ac413bd4da7e0fafe1c42c2fc346fbecae. 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/UKXN22201559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f0736659feab964f7d2f89a88f24d0d52c19403d42b1b88ed2496a9b88d23. 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/UKXN22201556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27696f4294a8dd851e2d38cf3ea977fa4850ab4e6d9c59ce329f82f8ec0207c. 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/UKXN22201557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5186f2176338e92f9154849d7bd546de5573ed3db7af33a03f6f498688078336. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/UKXN22201558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2eeddf6ed5f8cd6123b9f6d0605735a775cbd2829ceb2ed0dd0f309c83bf6. 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/QZTRX2494166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82311cc612f1556095ecb7409beb793e597db8f104a919e3c38e55a8f97e7e9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBLFP2317218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff139729c0b7f27a4525b2cd75300969d2a5b43905cbd784d41a8fbc42c626c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92577145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6c6597a42868dc7426672538d792127580ac469e8a9cbfc4a264bb6369ff0b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3Q92577146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6336261334937901d63cf2522c00b955cf29e187a12fac5d81706102eac7e2aa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92577147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2eeddf6ed5f8cd6123b9f6d0605735a775cbd2829ceb2ed0dd0f309c83bf6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTRX2494166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d868bee6bf09de27061434e40e4e7494b2acfa98f3f60673170a5f44a81ad. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3Q92577148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45faee5580cd398721f6a4ca83df2ae3ab2375a7cd793026ec39885af65dfc59. 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/GBLFP2528062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d3d8638917d9339d3edb453619bd1120a0e7e2aed8a9868e84a75ec50c8b83. 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/GBLFP2528063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c446923ef4f0260f8c4eb3f10403f2cc03258d9bfa86397d2a1bd53e379687c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBLFP2455606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6057bce126a8f9e6ed21854be4ffd9a03e3903d17e26eeba8ced84d45e08234. 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/SE6I31982597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d8e4a36df166300c7b56c4e7c0ed18e8fa66f966c8308cd4bfacb65489a4a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUGBT2406144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd425b5efc88247e15156a6c00209d1e7bd865534213dfdf812cad07ae405113. 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/AUMEV2586441.