thumb|upright=0.85|Tobias and the Angel, by Filippino Lippi Tobias is the romanization into Latin letters of the Koine Greek name , which itself is a Hellenization of the Biblical Hebrew name . It i
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 0x869222cc5265155df14f47371911b3dfbcbbad822839a52cae8a91380134af30. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f276f5aa-2acc-4beb-8fdc-9132c1945d40.json and https://artists.proofprofile.net/proofs/artist/f276f5aa-2acc-4beb-8fdc-9132c1945d40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Never Wanted To Get My Licence. (Side A)
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 0xeafc75444ac517af72e39ea0f5804992a46489d9baccd107bae976e31ae6cde6. 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/QZK6J2167104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c4ac42a436bf6e24bc4012a7eb4d56be4fb3a21b4e1c543600a9dfadf1161. 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/QZPLR2057415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed7a5064f28bbf4c80d05fdd61ad3530af8a083ca5d6e8df41b73e91f2d77dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUK3X2401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa82537427f2593887712bc00c23399649d308b0d40c0d108dd5b511c29481a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2374920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b45f9579ea9b8b627104ddbcd68a553562e27a72c1f76fa59df2d7c4abc4e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUA002301194.
I Never Wanted To Get My Licence. (Side B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7795967b86bde57c9f725292996a73f3386ec1407cc4d10caa1fe8f3fb292fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUA002301113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f46e7a75c53ddd5700d2f5d93738f52977b5e13e805c5e9bf0f97edf4f257e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUA002301026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25ba4a31081966d59ed636c234ac503bd113fa26bade790df208db60d07ed1. 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/AUA002200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7ef03745cc1508c8bcbeaae1b84ddc881592a537c6f18a011a205582d0327. 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/GBLV62109458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb3433f72d1729493f8a083504fe890e289f199d67db49f53553980d5887078. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV62109460.