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 0x459da3aa2a30106a653585518a03f7032b3cd7202c80175d9a3202f77a5c33d1. 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/066f3903-1d3b-49bf-a63b-73b2f0ae49d8.json and https://artists.proofprofile.net/proofs/artist/066f3903-1d3b-49bf-a63b-73b2f0ae49d8.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 0x3e7b0088bf12de5d6a65652f4776928f464fe7ed2ab5e3d48aab9d473520ca5c. 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/AUMEV2396392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204f85b53934255304a014e1c803b75036c116c35f6ce7fc04dd4cbe8f72790e. 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/AUMEV2396393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ca1d430111aa8612d4fb486b3cc2fb6336acb1d4013dfd3c082e7dcc0e14d. 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/AUMEV2396394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0c2b4b231f8e6296e86c26984cda8fbe97b2aa73f0ecf99174dd4ce4c3d592. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUMEV2396395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f12f79c55d99bbf7adbdb4c218de5f4c0a4aec65512715f937b50caf3de78. 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/AUMEV2396396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c10a5d9f2ee5b77811a22d24042d6556f504ac2772c0f1433c7378672e77631. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/AUMEV2396397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce785b5bf2ec711d6b9e597a3ebd62b00b7bf16728034241420b539eba1687. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUMEV2396400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25788aaee39fbb2e9c551043b60631bed95173ff48b50c56ebe92ebd5531d6. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUMEV2396401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dcd6d2e1b76b7d5d94907fc55a56f2deb311d54d14c46bb22def50d1acb859. 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/AUMEV2396403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f30b1004c8f0ae92baa95c48f5ed5751e6701636ced8800ecbaa7c5dbcb927. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUGBT2323109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60917d7bb140e891069eef7bc7775e9b9c89e974e12811d8472e6675383b694f. 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/AUGBT2323110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018a7061f9d49fb266c4a8a0b4ebd00aebba6a3e2eba16887fcc495fc50be4cd. 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/AUGBT2323111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286c4b380617730d7ef779513915f281483c6d3a566f870ee35320db9493a43. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/AUGBT2323113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e9ba5f9c24bf89122865fb0bb6606c0bb32f27e6921d7e41b00f3b478426cb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUGBT2323116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8859870ae1e51ef59c18de4741c422ef59f001437a62d3836e8b58ae94c8ec32. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/AUGBT2323117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca3a538d479188b95c9b4639bb7374722a572c4a70fbd9519c55137b15ffd3b. 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/AUGBT2323118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ff391719914ffba0f3ce51f561ad7ddaa199fa53039a43cf434ca5afa4b034. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUGBT2323119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab9df027107c5acaced54e8eddc192ef9dcf361462a52e0dc1c66d605473e81. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUMEV2401242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e25f4ac2888836a02a5ef75cb3fadf9dee77eeef05190d876a7477854cbb5. 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/AUMEV2401247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd7ba1cae927f78e9828f0588706a422fb4ea155534156f33b1172b76c9bd88. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AUMEV2401248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb057dc698ccf241f2a31e0441f9408a0660c30479ceefc99e67a80db369b0f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMEV2401251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb23c77cf368a75d456a78cf3da58d4a506023f7de96afc1eaf27131708be60. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUMEV2474049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315bba60b35b34f182c87cefb9ef4ff504ded667d7fdba323e90c98a82f47793. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/AUGBT2479796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c7dc6d772f5fa922b668c0390619a66a695c0de3501491f6b8d58557254139. 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/AUGBT2479799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dca26028532ba7bffa9c03adc61feccc53ef696d1bd52f3fa68b0412d89b4e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUMEV2519716.