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 0x824d9bfbafcb6d50716b6068c32b6c064c131ba90e8afc85c1b9cc481e0dca23. 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/0e2e39c1-7fcc-4823-8944-0fadccb0d1ab.json and https://artists.proofprofile.net/proofs/artist/0e2e39c1-7fcc-4823-8944-0fadccb0d1ab.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 0x409f73d93a081dc7a9de09d9f8909ab7232e692e3c8f6d45b42c0d4741fa3c29. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMFME2336335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af4f6e2da2db278b25824d095eee068feeb4f8b60820d5f598bdfb356554d0. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QMFME2336367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbdc1376975262cd0991df4e545ec4e6d56ade43b486c98d49e9d125ced5b0b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMFME2394112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46292f8ad179905fc50e9240d6e2fb4f6b73c53c16678033102486252ad20f67. 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/QMFMF2340518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374e0d8da7fd4ee193d6419bc5391fb999d3636ddf174cf9214e02fbce26fe45. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:14Z), 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/QMFMF2392587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d0662fb1128947b55ed01f526c777b675ee6367794610fc167c7b6a204f33d. 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/QMFMF2397056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04f5730178bd88a0904c1f56d0a9ff5538dde1f1d514a0edf8997bccfd0fa92. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QMFMF2397057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24779c71a2327584331260fffbaf797ec6c03aac0b97b4773391922e4b1e498. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:36Z), 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/QMFMF2397058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7afb53fa577be9d99786c74c4c93abc74971d751ab930c3aae19e223f6d289. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMFMF2397060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9ca3f3a36ef868d15ca5e561411750573365c84c5d4f3c09e2706600573f67. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:58Z), 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/QMFMF2397061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc38ffc40c1d6d46d8ab793810b3e64a8c70b54f8bd02c2c10209f272503072. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMFMF2397062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482fbdd8d605e0891a430d9a53c3517ddbda7b95e1243356a7b908c8dc0aecf7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:39Z), 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/QMFMF2397063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cd034930fe1df8fc41e33a71159ca7f3801e1514cb46749a9b92daadf1a59a. 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/FRIDO2113599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f9442b070026b3ee2d2ee90ecfda98c9bac733748bbacd9ddc1117fca0a55. 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/USA2P2114965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3578856f1e3b2985751666e4750c8170fc4b8d523a33adce0d0e20968f9eda28. 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/US3DF2222569.