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 0x8bcb03c81138c4a7c4707071dd2f5656aef40f9ca59e4994df036cc97ec6de78. 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/986d84bf-14f0-4aec-b7f0-7eb7a974cc48.json and https://artists.proofprofile.net/proofs/artist/986d84bf-14f0-4aec-b7f0-7eb7a974cc48.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 0xcfc725b57270d279ce1d2a953d0c52c4bfed6ead5ed47396fd8eb26a3bf034d4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEYU12308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f262369aebaa8645f74613e1cd76b0c7be5a16689c5869a0672af2d26af27a3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d548c3088d4a3f1b17a8e40bf40face3727eb3c8424cbce267f886cb4a92c. 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/DEYU12308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58779b634fb4259ccdb72fcc2af5e491310d9043db84f6240daa3b86d3aaa60c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEYU12308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752429496a30b6424f9cad5c54b9bb2b26f4800499b0f470ede4a4a44aa6f0e2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEYU12308007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceaf94101ec18a1525c280b9da977be57b783fb3ebdbedf6e3bdbf589092b04. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b226bcab2a1e55cd349973b6bd19e2d42dbac93e397083892cd00ab308893ce. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd236fcc517cfa63f9d6f65b088c7e8a6d049d8c4b95cce7f4d30d1a26681cc5. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEYU12308046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85f9f4936f9503b73ae7a62bb385903d00f3ccb3ecb19efb001ef10652c306. 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/DEYU12308047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6f81abb7f0e15d3553bef88bf08443f8fc1047e3398d1871d5c73cf7d378b. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/DEYU12308048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac7eed102e37e5c0a72c132d67a126952fb6996d3b4a8bb513c483f80a3084f. 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/DEYU12308081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6876ee5fe76ffbe558fc3f3eda071408b9e52ef3b24f10b8649586a28ba61c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEYU12308082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eda2df8a9b2633afa856e529d93e851650a56a41274f35def16e846709484a. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEYU12308083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae4bf657903069d68f1aa805ff9360716e7eef0fa1e9aad1e14c6bfac4f33d6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9bfb05744e69afbecb90169b92966f00249abbe38fd90b457ca1375a0ea90. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ddfd16fad79f15760498228470cb0f3ab7829ea9832486f100fa67066a09e0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEYU12308088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a5fcbb85334f101f753b65b2a2a70a6befe9ce5b321977d98fca8c330f5f7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e0bfd6a1e598bc2da3437cb634959e4fed4737afd281930af12fa1906c0def. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEYU12308123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ad53a3a908daa8b2d67f465acd0df9a1fe2ddd55d8324f109b928020c5c57. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29465f64b5bb8c6557f0a14ce6811c16c3764c58a49cb36b55dfad7d780bf0ff. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEYU12308126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8fa45a16224f1a64ec58b887d59ce39b0244483ddcd6fb8d7c3d22fb301216. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16fbdef03bd3aed560f05932cfde0d5834e7e42bcde680989218da66a404ef5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEYU12308163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46af327ec853a3bd9934bd8bbdbfd26ae1672a62d086f61d47bf9dfeffa60c. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/DEYU12308164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ec6bf5ae1cae48cb558155ba20fa11a89a63efa177e8795f1bf44d36f6511. 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/DEYU12308165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665dbf9a2232aa0746bba9eb34a88dcfe981bbd2a7ce67db693d6ea437169fc. 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/DEYU12308166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a78cdfbe341b1ca8d1fa5cd75adc82a45454d22615f696875506e8a85670c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEYU12308167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6f8f7818b916dad853583345b39d14cd4996da31a648e266363bb4cd09b34. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEYU12308168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7c92d45318ea9bc7e00e6ab6e58c882ee54865ef08b5bf90d7bba9ab4792a. 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/DEYU12308201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dcfb7338138df775bb2bb59e35322f369aff84b2e0f1cd3cc55eca8c8f6be9. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d6909d8d315dc3b549bd4485ff191ae211fefe55de6e3281e6b5c9f24df4e0. 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/DEYU12308203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f45ec0791a319dc56ae87cb6e037e7ff7fe0e6d90a471ef3daf9f9e67217395. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DEYU12308204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c8e41a833c326c25b375458b00779d722583da7fbec4c95131df094d0977a8. 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/DEYU12308205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfab378513944b0cb1c9891303697c3a7f7aec8a711bb14ad128f78aacf4a4c. 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/DEYU12308206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933d43483a81370b1e603730db14308f5361f2e8503221f0fe6fc64adf08150. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2258f61ba4cf6ad35707622f69be74435bf1bed8ea3513a682e43633264cfc. 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/DEYU12308208.