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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fef7978b0fa25ba0a6c3a9e274c6a261d2c35b4f2d60c0ab01272253e3526ab. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed93348e-c79b-400a-af37-83b45508ba57.json and https://artists.proofprofile.net/proofs/artist/ed93348e-c79b-400a-af37-83b45508ba57.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83acd22c9e965631a9231d447900574f13c92818238eb31a8f50aba14fa5891d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHP2586000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad22f49ca0a1477b2772fb7c45c8b4f9e555f666dd0f58b7ac727af169de8e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM42K2589621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e7a04e90b4fb5307a440634883ec3d55b4fd161d80f22d953acc989678eb9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHP2595159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342b0cac7b87778af1b20c8d6080baa7fe3efa045f016018d210e60ff8e703d2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZS632558739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e497341218bb59f6813322a86342c2082a6edeb99f11ac81d25cf32c75b432. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMHK2550744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3863ddf0003db7cf4e740395a413c02dd468940a5a2946bb3f92655666cf2b9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZS642506634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a4d23967d8c37054fec0f24fbaed8106b677f2e948b01b581fcb5fc8b4deb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:35Z), 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/QZMHP2551436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d58a371cd414cc3f0cd8d0b0584be62abce30e9b4cf3b7f8771fd29d8a88a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM42K2506320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf744b8b06e6519ef3080c525073284772f7d3e1c6e68d8eb3d026a3215b06dcf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:52:48Z), 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/QZMHL2574046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa2469cb4ea3ed63ca2209f03fd294d48e12624dd7678c09d1f00f36c599385. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZS632548059.