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 0x3536ca59f70409433da738140b3648c1d06e8a9f6693cce76b9a9f0c8ca94c0f. 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/0088424c-f59b-4830-8f95-7ee3d3b1908e.json and https://artists.proofprofile.net/proofs/artist/0088424c-f59b-4830-8f95-7ee3d3b1908e.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 0x220e7188170e46e066beed5e166c5e1e42e11d4f0126eb08dd5335269e83b05c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGE2233940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c17b736d4a1b86db0cf5d2a848525a5632fdfb5669429d2ed4489642dec3c. 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/TCAGH2236442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008a1bda87465541485659284df53280f4043102b970feb4b619974e779b4f4f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAGH2236662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5d933312d5a03a949f9360d1b5fdd177152587f871b93ec29bb27863d7e02b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGH2236477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb227ef09c3aa9415ea0d175d6d242a769d012c9b383cdd205dbfb99e11fa455. 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/TCAGH2236485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cea738ba93706887e7613bedd849dd8d356d68f085490d09be30c3bfef538e. 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/FR9W12322018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3aa67c318f8993426517ce6469b7e1dc7cd38d277a6bd01acc39b98775a6f7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12320089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc533aa78d8986be3abeecd9f808fdb618351dac244b2bb5f44fe92d33a47470d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPLR2369227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec44a7025680de75cfc7cd66a8687460ba5f3ef96aa011244f3de6062c256d. 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/QZPLR2369228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3609a7e6ccbe2ee1c9a3d44ee81c7af9a57fbab31fb6b90d420d55d217d10. 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/QZPLR2369229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b981858d059d44e6128801f18c24511b6112417b8c259b148629354779c294. 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/FR9W12354717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91c8586c224c1fd5df2fb16ca4366e8d72127c9b0f7da7560b71b82507b44ad. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR9W12359501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b5da56e8e04629b5812fadeb6e9bf8777185bee41a4ef98c944190d658115. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FREKU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fdbc67e75bcfebc6e8d6c950c9f7a9d5e1fadbb9d9c8bd4eb25794eaafbcc4. 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/FREKU2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5858e82656576ccaedc33cb8c6fa1597b241e98f658a85853aa64a39bcf1b57a. 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/FREKU2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566285a800b1c6c018b9c3f1f4a28b36bfdd00af1358bee43e05757c2af363a. 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/FREKU2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd468065aec6dc76e6293d4cafee6e85f6107ac371443ed237c8fd2aebef9770b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FREKU2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93337757904c43b5b301e80e55362afc39bb5ab90a499b84e70cde9cc7d1730. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FREKU2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41c74dd046105392bb3f37437eba03097a2e122274ca2f7be3ae90b29bd1d70. 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/FREKU2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bff462ce7af47912842322100943a98f4604fc0f95096eded744eb28a70f0f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FREKU2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75146c0a005f6ab96d89a019253784260c4d5d799803aa9c37a008b635e5737e. 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/FREKU2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad689686ce5ece4310e44b15404699c4b8b05073d02760d35604d80073377f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FREKU2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231aa66305f2c503d1428abadf07715741b8ff590ae625326d1d2485bc9c060. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FREKU2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acf3b282d5a44515f879b7641407d084fede17be7a75f28c35a1543889e3b4a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FREKU2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f50a742a156e371ae9ed52fab8801aadeddad697a5df73143a19b5b880540. 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/FREKU2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d4e5051d9a33d77d148359a2613942665dd3f7e6c3093c6a42a688e7248878. 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/FREKU2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35f5ac0f093727a4c87fb6f08ff1d774cc96d64ecf673e072dd16cc7c695e6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ32426055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c167a64c56e47673ac4eab0bd1522107e2cd6d48c4a735698d94e97052543. 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/TCAIW2479337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a2bb70e7355a260146b6aa10e3356f9b6c58e983d2093ecbc21f3c453067bc. 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/QZFZ32444845.