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 0x34746a68388aca38f3a994d50654ff320f0c708228a6be87bc0ddde0c19755cc. 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/1ce6cffb-e0ea-402b-84ed-07da6bcc9ece.json and https://artists.proofprofile.net/proofs/artist/1ce6cffb-e0ea-402b-84ed-07da6bcc9ece.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 0xeccd3f21f70f28a10a1a98fd69a9fd5cf4b1fdc348acc9d211d9e0e3fa4dea86. 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/RUA1D2518572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d2cdc25ef26ff6166387cb9c2e59fc3a28a0fb2498df918118e6e5a1b11a9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/RUAH62428366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19fb2d61014ba2d48fc20692b85ea510ac2c1f37a7dfb53d80df351bd2765fd. 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/RUAGW2401728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af81b963fbdaaf71e49e1ff3c011472171603854a3880ba20ff7a61eb3f72a. 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/RUAGT2457035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6e2e4714594254828c93f171a73f4a3fc3e5276c1610296f45b75ce5ab42db. 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/RUAGT2430736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1200bb76c55d9e194ea21448bb72bfe1151070a49af085e5c81a841dd4c98. 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/RUA1D2485073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c4d1ce30347e3e69c9800f01e845ab9a93a2ad36fe251374adbb7994ccfe2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/RUA1D2447539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e323d4f2c79f97b1c9edffe55210ae17244d77f7be0e7d9d44debdf9aa2319. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/RUA1D2411483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729a68076202b08706bea2dfa8627893e58c22cd9646e97c1a316792e4f1497b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/RUAGT2370700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd4c3f916135b4ef676e19286e6e2cadb3db19a9d9d02f59fab4041a0e1047. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/RUAGT2363570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39bdafcec497e3b1e37d7a583712305aa020149011db3c34d056269955251b. 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/RUAGT2328688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d864d2878bb6fbe49a5736c48b5df9a40ae50526f2fd9d4b6b139259a54b9b. 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/RUA1D2374636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cf5e124d8b70e152366f242fdfe7d443ba8eb1ff537c3f1ebfe3ad1e2509d5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/RUA1D2349942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bc75fff5a65c7ad10af4c01030b082ff4152f207f8f5f47f34b20ea82848a8. 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/RUA1D2331255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f364474873498a777e7f26ffcae608e5f5775a4f353fed08bcf8630d52947b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/RUA1D2314043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a85e46e70fd46494459e4342d4d1fc89f15a0ebb703c683256ef7a39375b02c. 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/FR2X42369152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf9981715a5345be2384deeb4096e2a240ff33a2fa9081fed94348d3b4accac. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/RUAGT2205284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44094cec7e9fe99fb5488a271e41e30137834ab07d7ac72ff885e3e6a2ba2f7. 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/RUA322203057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6373f8014a650691190ad8a8e3f463b3e96e92c0101f71c7347eb53c09e8bd51. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR26V2013633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2253ddffe7b0525a723779dfe11dc1b9805df5d4e906923a8c4960c4646c992. 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/FRX872023126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1836fd644c61850e7514ff982380dbdd59b783acc90360a57f2a16f53feeac38. 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/FR96X2073233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d96fe517fdb361bee78465e67e29e711ee165661fc89672e1bc9bbf132f707. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR59R2083117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f00ab8a9b64ecd4219068c841247a81e933eb0d06f1500bd98a47ca56003a21. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FRX452036560.