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 0xb611c38359510476f4980ab8e432d6c1674e9038f30a48ad595a39ef2e3fbc1b. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ba8618-d2a6-4c3b-82e3-d2e3bcbd746d.json and https://artists.proofprofile.net/proofs/artist/74ba8618-d2a6-4c3b-82e3-d2e3bcbd746d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal Warm Ups, Vol.2 Intermediate and Advanced
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 0xfb15010543f606408d5502d2d6e2be7299a36e3fb8fa9384eacf1ac098e7812c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADU1897039.
Vocal Warm Ups, Vol. 1 Beginners and Improvers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f7e295122871ec48d71e65293e711c8fb1e9273a5ea249f2dbfeabf5417d2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADU1897009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76dc3e9d151797e66c8e890423c04cc0214c78768bd50bedd71ddcb882c05e7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAEA1965608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5c323d84802b7e22eb32232119a9fe1163e60514aaf9cf60a35d3b864dc84a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAEA1965610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8f53c58d8e9f6656a0f3ed11a3864dcfd37c5e52313a1209183612064912c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:05:51Z), 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/TCAEA1965611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaeda7f1545f629963ec2d30582ed56362c213a44c65466c5fdee1a77d59662. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:37Z), 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/TCAEA1965613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5017b828eca236027c998344d705dab4c7df28982988b46262b35709f8183ea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEA1965614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f33bb4403a39273547bb9b431669b43dabc7b4154c516f5b3f7b16f18269f2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAEA1965615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f778bfd191fd2a4260fa66ee47af2ef82fa4918bfae848ba4dddb50d6f7f7dd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:05Z), 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/TCAEA1965618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97da0e63ef3717560eb2ac3e373a42ef8f1993843dab4da1c562ee5c9e630b67. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAEA1965622.