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 0x4816582144f0dd3b512abb65bcef698c519c58275490851c93286875d986c25d. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/273f3a6b-2b67-4b4b-be0b-ab0cd12badcd.json and https://artists.proofprofile.net/proofs/artist/273f3a6b-2b67-4b4b-be0b-ab0cd12badcd.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 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 0x13167cbce4c9e77eb833ea4802f12c63b5508f3935bb350d53c133662fe14817. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEA890800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8326b5f26642b75d2e5ea997292cdcb28561d1a31eea18dde35022a1295dbdd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEA890800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83cc408bb09668e4704b0614c2495ff6ebdcb3c11580f9613e78f48e96c585c. 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/DEA890800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a9ac35a1452a977526d1bed2a2072721061c93ee76b9f264b1946aa1709621. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEA890800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288eedf6d55211e051e1da323de2d5c27add4c8b6baecf43d0faed6b71a9737b. 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/DEA890800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf760792bdc27aea35b081f9a7c620e8cc2468843973e9e40bb82ee40312a2da7. 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/DEA890800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22560fb2520ebba4f54b5107a9695336596da3be69b92a4c9a61a4f8a2b0980d. 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/DEA890800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b8f02d56e3f03cfd49533df7240b1509fa97fe2cc4e09590db5ad2c96e6d2. 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/DEEN41005104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75310efbb07a11c831285a3d4e99c670bf6db0f7481872bd7d07cb1a8705e6d1. 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/DEEN41005115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c61e4f79113a19c5de92e2df12593eed73ee84514478404fef8a5d66823ff6. 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/USA560573647.
The Shimmering Colours Of The Stained Glass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfebc74446caad1cfeda703b6044120240b0ba04362cfa75b43b6dfd369ec8e3. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEE281455901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f60273c95b3408205d5c41f11b0da85f3623d0c33f44ea66b029073e27c167a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEE281455902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedcc2b49d5072e20eaa5c99406bb6ac2f77db4a31040d89b9106d622a92e0d. 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/DEE281455917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31923147dadddbf34c3a351cc2df252fdfb7079ff4077eaf88adfba1d16cc823. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEC821076801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3764fc0e03cb885161c564224f8301261dc518a66acde5fceb470b5981f4bc5. 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/DEC821076807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7b2d4a8d8ff59bcfdd28ae314e56a36acb485bb10c7d429e4783ae30c1a329. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEC821076818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f1ddfefea77b0bec8e071768307a547953cd142130bab51cd614258f2efb7b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA551331432.
The Music of Greenhouse: The Spirit of Jazz - Volume One