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 0xf80eaa363a827986d8b7d0eeea0dc753a6917a5b4936c0f3288b511b4c8f8d0e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07af588e-6f21-4216-a9fb-e2d242681e5c.json and https://artists.proofprofile.net/proofs/artist/07af588e-6f21-4216-a9fb-e2d242681e5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Dog Day Lounge: Unwinding in Canine Harmony
Jazz Music Vibrations: Urban Symphony Sound
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 0x280849a44506f3d502ad273207946e990dcbaeb40969c913c445a1dde63b0e30. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBPS85265402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aa6d95e7b3f12a9445529c9633015a0957ffcf5ca498a07d726d9d5b940285. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBPS84846411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd0c32ebc2af20b95b70fdf578d673d41ab1567029d6a7930cde47a063ae72. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBPS85025720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8d8032d87204379385dec5691ec3acd578f945e8ecd9935f344f927f69a75. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBPS85265401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f45ea16c0da4ccdc247e574b148f61562a80bfed59f02f8eaec52dad6fa6e08. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBPS85265400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eb44a99d57b365fc16ad6c2604ad1d27381a837104c9ba54a0ebd6f2bc63e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBPS84846407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84db9b2a6bc8bd316c7edeef5b1c9ede2511bfb00d103bd7a7de66fd2bbece. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBPS85025714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9af194dc0e22d6101c507bc1464cab6e9960a1b403f09faee680b2df8d435f. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/GBPS84846405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3337499566a49ba28a69f25fd33d187054df94043dfe9d87db160a48e7397464. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBPS85025673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1290eba6700a3f48980c61c660fdffdb8fe959771a82430806bd5ded6e0c8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBPS85025711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5640d0b68d7a3edf1ff765cf2e3a80602c663b7a892da85e8c18c179765bfd. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBPS85025727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa4ed04e297f67886a29ed87ba04a76a50640eaf6d1166d36c8bb12f584778. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBPS85265388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b9a9268108d55097e430a03c9a0a020618fa56f3a0a42df381729927d002c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS85265404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274569e66dd972605ff22924a352cb9a8db94f62acbef1b1b12c8f4ef0966b63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS85265396.