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 0x99ea1e5ce60ba11f4914eab3d303428f57fd5af23e5549600ca4a99d4e3fe5ae. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/894d80d4-89f7-4ffb-b1f2-b8946e4dd165.json and https://artists.proofprofile.net/proofs/artist/894d80d4-89f7-4ffb-b1f2-b8946e4dd165.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 0xccb7703dbe4549966fab47ba43c54a6f0c8a08eeb696a614323be4b723f2d740. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51578297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb688b5ad3f76139fb1459e74deafae784c46d4949535846c759f0f222192a60. 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/USQY51578298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30e7f9005e9ce29dfb7f372a2c7c6cd91f655903e90e09c674ca2902112be0f. 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/USQY51578299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e4a6a20b1864b6df48f9adb48e73b35a64079f5cac511f14f7191ce06e06e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQY51578300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1342231c91b6f33e33abff875dac133ba98711e98fac77c340aa281e356032. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51578301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406add8965e65031ed0977e63ac16ac0228cd2f6d95c4a8628c111a1633dad7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51578302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ac6c39d629d06df5df01d7dde499407129dfee567bc478e21786d114676fab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51578303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869f2b3a9d3a083293d72f46b2e4233077f0116d0e236ff0a8bbf9f0f4ed99b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQY51578304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc81c14e9198c7cef3a942d5654c6931e31b4ff9d7360c709874cd6f910814. 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/USQY51578305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530af2b2da0173c4b57b43c2144e89ab899c28a1c7ba78b429c2db9d2ad4e587. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51578307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d2bd69ddb9445bbbf6bbe6f90fe73f5c88b7d0d38b6652e8bfbd845ce569a5. 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/SE6YY2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ba6df0b574100cf769f1a21aa9ede8eeb16060cb1c14065c383cb225ae6fa1. 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/SEPXS0701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530c33266ead87a0bad0bcf6d1ea3dcfabcb8ee3555aadfce5ee8e3bc2791497. 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/SEXMM1100201.
I Found a Million Dollar Baby in a Five and Ten Cent Store
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096e7e0a1ff294ff6633add7c760ab1d4ec28fee3c55adc4f7f1bb5c4a79630. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEXMM1100203.
Big Band Minimalism: Works of Mats Holmquist