thumb|Princess Sigrid Vasa of Sweden (1566–1633)Sture Arnell: Karin Månsdotter, Wahlström & Widstrand, Stockholm 1951.Lars-Olof Larsson (in Swedish): Arvet efter Gustav Vasa (The Inheritance of Gus
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 0xa012b1c1ca3b005901ca11374f5a45582a007f08c275ac55f0905843532cf885. 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/8f5d6d96-a95a-4569-bff5-3bf0ccc66c2e.json and https://artists.proofprofile.net/proofs/artist/8f5d6d96-a95a-4569-bff5-3bf0ccc66c2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Say I'm Your No. 1 (Full Length Version)
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 0x90de700d57dd6a89a276db3d9abdc0216f3e4b8eb63eda173a286762a97c8880. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/GB5KW1800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcee02b03d860b5029d8b5dfd2fe0053b076223985718db9064c3c833ac7bbb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:21Z), 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/GB5KW1800546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e29f86190b96013d1a30a26774f95a5953465f1618142ca7121ec1c19e635dc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GB5KW1800544.
I'll Keep on Loving You (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e52f94d9f8422a90bee737933035cfe57aa1fa75da6699a34aebea1abeebf2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBBTK0900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a684fc76b2059358375ce87cac73abc516ce385d61467e97eb57fe6ede80d6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBBTK0900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a62a99d1960dccc9c902afd460aac1e6869b9a39420b5672a5e9fd22fe942. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:38:58Z), 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/GBBTK0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7076338dd5c867722f980bcd62a31ed15cad3da854dcbb41a79aa35c781f7642. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBBTK0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef9f12617df6b7b31c89f74300892c1e3bb8ce6f227a4194c0f44fd596f80e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBBTK0900044.
Say I'm Your No. 1 (Tony King's 5 Years On 12" Mix)