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 0x468bd22105c2a400481cbfb468709efc793e11cd18d67a2894fa7fcaaf799fae. 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/1d8d37bd-fd18-4aba-9cc2-03f72dc8d5f0.json and https://artists.proofprofile.net/proofs/artist/1d8d37bd-fd18-4aba-9cc2-03f72dc8d5f0.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 0x6f076e8bf2d3f896a70681da7601f6eb8b23b19043125cedec10302224e1ae4b. 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/NL4NL2215067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc722631103586738f3462e08b3c336026cbc02969676a9a00e65f723b4df93f2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEZC62376737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b172a44f3e8f748c564b59082eae5eb685091f299b4da661d5c1ae283d63e24. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEZC62382022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021795d43ddf0efba97c64472fba5b7895e12bebaca03948042a30f0a607864. 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/DEZC62495617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d93a2fe21aad4b6238fd71a5004995c75b9261624d6869da8e894c0fb1f82. 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/DEZC62414494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf429bc00fa20271d14ea9fc7fdde1940b7e3e22e918c2555b4b03ec1fc3bf0cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62419968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40fd42e5c0d82c3621aad2929e1dce070d8adcb3b288f19576d8e793377674d. 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/DEZC62406371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf90902cc40ed6a54a187822ebc06a3066c7dafb8c1cf4104c0d5277a6831e45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62436445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf429bc00fa20271d14ea9fc7fdde1940b7e3e22e918c2555b4b03ec1fc3bf0cb. 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/DEZC62419968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd791ab84328b6c39bd70628afd6865eb00d0ddc468356f348d8dc15e6a852d. 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/DEZC62436446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba9e5e6eb883166ee65b31e9798dc9731cae24c2b5ef7e61c5e9598b15ae545. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZC62434237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03c991b473a2b0fa310a1f5f6e1e61d84387022f8fce09e7bd0e3500b70957. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62412958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545484c5ede5d94f3ded550d6666e574192a1416a1cadb0b2647a1c63d01c02e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEZC62436447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4269d73419b8d338d91ce6b5cd8e591f49a1c2905d459c9dd439f5768834a27. 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/DEZC62436448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d93a2fe21aad4b6238fd71a5004995c75b9261624d6869da8e894c0fb1f82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62414494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4421dd53e1e55d12379293d81f9cc2b2707c9279a20b1884fb32de879c0bf2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEZC62436449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc8c14e3fed4797af8a6c075d17df853ff0301a5aa5873a69bba587be29a7f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEZC62439393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c5449f8b0d481376f5f6c89872c231d762320fa186fa32a7c6938eb7bd241a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/DEZC62453762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66501a109949ee500e8b52b01c010589b45750e1f57d7cf73cc5d37b97002e00. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZC62453761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299623e5cd289e3bc6271d10bf4726bbdb7f2fb59abc90766d879680ab76de0e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEZC62588382.