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 0xf45d23ee7ee7f424d10878c9af0bd4f6d7950744be1f3f4fdc3eae50bfd081f2. 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/40270c21-41b7-44fc-afe9-74284f0f5d36.json and https://artists.proofprofile.net/proofs/artist/40270c21-41b7-44fc-afe9-74284f0f5d36.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 0x0b61e8ff7116066f5b861efbc4fd9eb37f232fff93251534b2e67ac406a10cea. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEPI82010452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f30e7ce1057d0be9b5562bb6cc777770ba44b580d66f708176525ab4bc0beca. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEPI82010453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2117978e94157fdb8bb2d25547cc8890404a71695689ced0ae647ee24b48e634. 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/DEY472279568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5f9be443fc1c99e2543dbad0be08f1b97ee73f1273cda0c1fcef22ec4e0e19. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEY472279726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae9106b3f1960a23a42a07d0cbafce1a06b17c6f13e5466e5fa1753cb705bb1. 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/DEY472376947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a482fc5c70adccad7346a73bb9a34a2e05f15fc0e6206744d7bdc06ce6981d2. 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/US83Z2338814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5fa138d5c8dcbe5dd4336a55c86524264cbde3cf5058391bf31aae998cade3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US83Z2338816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c213cea341e8aa0e728f38d8a820d56f6c2fee151cb944f0b318304c4401ce. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/US83Z2338817.
Colours in the Sky - Mark Hoffen 2AM Deconstruction Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be642ef893ad537ea0bf04961d796fbd361465acbd07929db6fa7b032936195. 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/ITFGO2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a39b497552cd687ac0c651e00c76ac6d303943c255ac67c6f1758926fd36c6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CH3132318298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd5bda3865ef968a8c3c22d1e8a490a01ff940dbf433e468bed7308545456e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/CH3132318295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79c162b84a3b00f80d459e9f15017d1ea1c6326defdf0640364c2ff6231718. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US83Z2497080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437165b92ad8f22607d924aa4001e5cfcbb097a8096f77c7222d55b1a9556cf. 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/CH3132419446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724028be4492ad800bdf898ea65b3f4297180ad3465174e3e483a3ae89f99392. 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/GBKQU2556433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f015fa62f6a3c0dd9a84546b25db4af4f58687343dc90b7b04d881c05481a. 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/CH3132318962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47235b9f3c4c3a2d63250cf09d230dbec17030c7a8c5fb6a6a30a0ba6ebfee3. 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/GBKQU2009455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12525c8de9ccd635449105406d0a4fce9351134a86117d043e770dbaa49881c8. 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/US83Z2497079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979ba32be7121d0f30f38de63b92e5a6abf8bf06f27fe6de267435021219e105. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITFGO2400106.