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 0x1356ee776ecfca430803e8d546a4a62519c49d08d35dda6283d792be0fcff794. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ace49458-9a8c-44aa-840f-3bb1d2930e0c.json and https://artists.proofprofile.net/proofs/artist/ace49458-9a8c-44aa-840f-3bb1d2930e0c.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 0xecd1c8339f12fc6604b9d2ed2c26075bb0c67ceb74000ba50d9c2959a12580c6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFP2435036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b20a8262b03f81eb40f11e698294738ecd51b3e7e55f3d61d4747e460bd729. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZWFF2409001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479f4739a79363f0a4a6cf8802d1a69c5aa298788c9c5f39a12c6691032dd7af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAIN2400553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697d5b10c58b3b0a4134c9c7c0d62828b89b716c60b8331f03104ae59e75e80. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZNWW2421940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815a96f2865cbbe4311113820e45b12d1207e9e259b2b103075e79fd6380bda. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES92417382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afcb395f0e8aa88fd53ceabedb6642965265e76cd00a617c222317c7f34c308. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZWFH2392957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c61fbc18722905cd3d6cde945e0a9f7e771da913a043b07a98325f54bded34. 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/QZWFH2392958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3898dedc7390fabb06969c3d2df8e8f6f48a45bc537235788804bbbba22e2241. 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/QZWFH2392959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175bc6c28d892f73ca0e4bfc7a1265bfb2a7de12b5c981d04b524973e5dea896. 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/QZTBB2360419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de06692226c98e6aac67af83c7aa50063ca766996e1549f6941bca78aab661f. 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/QZTAY2343878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d3158d80d87ac5d97fb04c006cf810622efb397f1b7fa7887040c44f3ed87. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCAHJ2303268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06cd4b38e67c19147560f4808c315c25da576eb8e140129bacb467c51f5dbf8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWV2348685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ee1a52438462ea7fe68131a2b05e389ee4ff39bd465d142b663dc20ce3d08. 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/CH7812349594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80571e2d624476678359249dba02678ed0aa10179eb8904cec53a2b60ff147. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAHC2355949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8712aba90415f84edd0c7720e9606a9a0055838808196bc8113d0c07e575112. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH7812349593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46753a0ee978d47d942af1fad018df9298ab233571bd7be49d6db9a86a01f73b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZES92330650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6699cf315ddbbad89f90e8942db7f7545ef5464f29608cba8e1f65c5271ecc. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZES92330651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ab1e72db3c46cbc8f0e89aba015ce7c49ab6105469ac5bafb99cde23b74753. 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/QZES92330653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373745a265e30fa98dc84f03a96a5020382bab24c327e3f6aeb249385e6104a1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES92330654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f020ec8a765728ac745612c08d1db7119e90175532c6ea58bf3792280597f6. 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/QZTAY2274180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19414d21b8a5c7c524d0bc8b73d77253fbf0d72695589aba8e0c2d8216240ca. 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/QZTAS2213128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72dc09600de89d61ed93e9c1860c8f22f2dd2e632ed410c9391a2b44e9aa978. 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/QZNWU2210639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b7f0e5569a88e2e9823566cf400125aa87bb1721b50b9a763bc3b7e7008f02. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZK6G2231674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd202c2db9480dfcdb49b281eb2cb7137aaae18e4e76e950f7a0a2cbff711d9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6N2281137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cbc9bea5ff439eddd944042f5361854f836e5bbf4d7c96ca7f7fdf467c2385. 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/QZDA42219402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ef7371198304e1eecaa90c0207cb0c72c5ca71469d1120cd4f33b2a72afde5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFYX2256898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5267f746cdf591eb42ef597f22ae477dd9dfd17abbae213554c4e5df65cfdeda. 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/QZRP52110922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a0724b4e6294385d3badfbaa7fe5913186a3e8ce3a5d97775f915d3abae240. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWV2101369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c3e2afef8fe8473dd5f5782715f5f6e98ba82936fab3862bedd745057ff838. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES82272864.