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 0x1c383c972b3c9804ae398bcc6b928b606a26a0bb9cf614459f380ceff96c4bb6. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39f97096-611d-4547-9452-75483e3dcaed.json and https://artists.proofprofile.net/proofs/artist/39f97096-611d-4547-9452-75483e3dcaed.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 0xe3e89f23e7799faeb1802c50d929e3e39274a23e42fd65d22e7cdb286f99103c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBQRF1208740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1602493e6dfd1798c607679049387ffe665f32829dbfac88cf187359156cfd69. 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/GBQRF1208753.
The Complete Lester Young: The Essential Keynote Collection 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30df370ce1562b9e70f577d309e18fc71836bc473642d0581fad53ef54a7c3b. 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/USUM71214462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c10df66c00c4582f48e708222b6dd749b254f1d17e824798b0254ce9de4ea8. 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/USUM71214472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72db5f0cd4554b32ef7e6f1908a24b76d73e359eb42a1b4389c26532c5ab38e. 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/USPR34300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8162e46caf619ffb0bed7651be04205bee69721d612abc5fd014c1b99a590a76. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USUM71214473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208789cafc7951c39b296bd374c2f88b8aa1f39eb1208ecf30e79ffa9fb966d2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USUM71215598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d62e2c4750281cd2db8d145b164006b106b76012c875eb308f7736ffb5f3cc6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USUM71215599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8157556124648ac1af0418156f7da4e8beb15ab65cfcd8468bd9d7c8a0e2c83. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USWWW0201297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a34da779a1ffda483b8bb1a57b14234de463369954d99656986fc15f60b14b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USUM71214494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48817a34290082a27773d36def40a086eb481fba0477b1aa81dd48b69a72812e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USUM71214483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7818533972317950f6a104eee0338f216ece78ced22102a41357da2a5a5028. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USUM71214495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b74f250cb53d4cc0c0b47cac182bc62f9582c2b3b960fe7dece43adfc27593. 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/USUM71215595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c10df66c00c4582f48e708222b6dd749b254f1d17e824798b0254ce9de4ea8. 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/USUM71214472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208789cafc7951c39b296bd374c2f88b8aa1f39eb1208ecf30e79ffa9fb966d2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USUM71215598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8157556124648ac1af0418156f7da4e8beb15ab65cfcd8468bd9d7c8a0e2c83. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USWWW0201297.