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 0x0a710f75ca391d6ab475080a13fa824c7171a5888a4b0a290afdd64bfe6364ce. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5c55e92-10dd-4867-a61d-13327ad45af4.json and https://artists.proofprofile.net/proofs/artist/a5c55e92-10dd-4867-a61d-13327ad45af4.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 0x75ccbefb887184d947cc60cfd241a93c0c2c8974312a30b716fbd0538e5511df. 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/PT1GK2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e913f20d9d2e1701428a053fc4fc1e0437012e7b2304de7e9045fe929ef730. 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/PT1GK2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b5ec0c9ede5551b2a143232f075e86dbe6040d4cafb100626380efc533837. 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/PT1GK2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4351c7a717abebca2eedeb44a5da4c886b8a50cd7f564880ceee7be2ffda167. 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/PT1GK2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b316a567d0217d1f42a05dfaac28ad7e4e4800ab39047e137a187c2515f80ab. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/PT1GK2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27155b2057155f0aca8707a8896d08a4bb6c31a4b96773894ace372abf3c9be5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PT1GK2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592146176ffa14a8173bdd041d5adaf21d69a455f196fad8a81c0542274388a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT1GK2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e9cd63cba5d2babe00f7f2ab1c0502389957c1a340bfbce4027d47ffb19682. 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/PT1GK2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb334ed26b0015e02ebfc1a37e0b46d7d39b8e99a7c19628123805bf523a80b8. 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/PT1GK2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a9bd67aefd566c042fc1d1b1d11830bb0dde5df88970ec66dbe675fe77377. 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/PT1GK2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6e7b19028005158a2adde0007e2ae82d86701790a0fe773a5eede70c62c93. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/PT1GK2100063.
Nothing But... Afro House Selections, Vol. 22
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df89d149ec1d1522064511e24b30a8ea5f0f0cb0a142f0f36e1fcd74329516a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZN882512955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02666a6e493f8b6b4cdeef600bf4dea3a421c7e094f58cc640ee96eedf9c5da8. 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/UKR6V2321096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a07205b27b58bb47dbf6b88166d0877bf8716e6bb20fe46d562beb930478a. 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/UKR6V2320612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431427c7c5c3925e0fe1cc341168e3980c3fbd21f5bfa3db2df23f9b78e6ebd1. 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/QM4TW1856019.
Elfenstaub, Vol. 26 - A Deep Electronic Journey Through Time & Space