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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee0634dbff65de49e5c110103dfc684b6296bd94053e22aca1739e3a84af732. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/245f9c95-43ca-42ae-aa3c-e6964b89cd0a.json and https://artists.proofprofile.net/proofs/artist/245f9c95-43ca-42ae-aa3c-e6964b89cd0a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc9c0e730abb2c7615addf9e6347e7b726e096a82f0addc928d011818ba1c75. 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/QZZ8B2328639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb34488d1e8bfd90b9a4dcb6b7de3e8c0ae3b7d9b6c315de87b07be62f2a4d98. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:41:03Z), 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/QZZ8B2328642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf686fa7e173af0369ee9484765fb0604ca099a91f087b39ea7bd1e1e29e53caa. 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/QZZ8B2328645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908d0b6a8cb737b9a3e3f04ce7d54696f55749e62a65131688127a7973822e8b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ8B2328649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f2ac0157642f14669f5939810fc44675568ec87ee429258110225366af2c50. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:19Z), 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/QZZ8B2328650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f8645bd0a7124326958e3ad3a977a939556f64e8295a3bc56055fb4fcb7854. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ8B2328652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf1bf1899a864cf08e715f21690ac1cf7c92c96b3e824f77be81d1c0750c4f. 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/QZZ8B2328654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47d05bf6f6005b46cad54229ccf6c77ee1ff85f0ac8aaf85642b9606823b33. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ8B2328655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c028808cc5bc32ee728e6307deea5a1cf2fce9b4ab93901c965075fe3eea0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:50Z), 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/QZZ8B2328659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c52f92fd6c5a21bd34f7fef7035cd752f9a62422a3603a536168f4c8ea2e17. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8B2328661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6a209d0ff85c6858d01c350eb23a703e6fa24a6a91c4555a97606979934d3. 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/QZZEC2306869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d170faa778bf88b41044a1ef5c37816eb68e8dff72cdf49c8ec860819ca96c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZEC2306870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415d54ae72ff67f16d0d8d55728417cedb43d93dc7f2c13427b8db50927c8083. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZEC2306875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bb7dd1616726c5e4c98e73415ddc39e429ad2f34f7d0223dda660d5641330e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:48Z), 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/QZZEC2306877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ecd84de846925c29bf40050cc5444c4ec849b0329ddf3703fcb3156bb8706e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZEC2306879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aa301a3dd99dc8c3063af65e3c728d7040b35e7d4ca2ca2737d5c0a049b746. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:49Z), 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/QZZEC2306919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702013759218509485b6e58b489a1008273dfb2f0b44b9995894d53a12d3ae11. 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/QZ5FN2432750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ad4a8936e01925564fd18e8b051c2cc2164bb51ac35361d5d08f0ee70f6476. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:16:52Z), 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/QZWDD2428206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8563c698d75e957206f58616230705e6d97b50b49863102940c1974e9372b9a. 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/QZWDD2428213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a73309609fd9e6d45821364563916e9b2f5701acef017ef3c2a1ecc0637d3e1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDD2434650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f80f6ecbca63df77bb1fe80dd7267fd6ce178594f6b60ce0ae7e7276deaaa7. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWDD2434652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b1f26a1c6a2773837971c06233122ddf19827428e5c46cdb22658ab986362. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:26Z), 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/QZWDD2434653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9843925da1f74aa11705c7edeb102c7d42327c5bf53fb4aa52641e3b9251b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:39Z), 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/QZWDD2434654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66a88df6d0fe13146385271f24fe5c9fe810fffdd51431cd5f3c279a2ef696c. 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/QZWDD2434655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08583fb2498af5e5490ef858c713a2d3b957af37044c861819443308cb6e78c8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWDD2434656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27550ab374b2db8cf2e0b7110294a32d5130fa7f47e38e116d1a398d24a6167c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWDD2434657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dcdf43a248809a8cfc1bb60886fc5782cfdfe3080970aaeab92a6a1152139. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ8A2500892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb9486cf120cf57b426ce8feb6ceefe23a3b7c5237910f8a38d84cc6184cb39. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ8A2500902.