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 0xc7cfcd203690aa85876f68d4040d966bd8c850ab9ab347e80923714d1c81c456. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e3308d9-9be9-4509-ad99-0caddeb0b0b4.json and https://artists.proofprofile.net/proofs/artist/4e3308d9-9be9-4509-ad99-0caddeb0b0b4.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 0x894646fef136488c30c94d494c8fe951e43f8b3f2d01a93857f8f46084e6272e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPTE02300560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302888a31dddba5beac5f1751bd28442c6996048c810ce2f0b2de06bc7c2b333. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPTE02203650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c75facc484a7124f0eb18d009da9bb58b3a313e983a066c7186b2253765dda8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/JPTE02300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf910dd839d26a46640ab476825caa6cedc07d5689104daa1fd136a23248a1e58. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPTE02300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241865da19b7c51212cb0baf16b73443e924df162025c2944e1acb666a2c87c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPTE02207460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22275eeff5fd3c9698811103f6fb997fa11b71fb368cac2abd8ed4cd70bd3020. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPTE02300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f9a273113f086400bf4479041b3bc2e96f493e4815a9e403a50b12eb69f98f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPTE02300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8f47091a25b4332a2bb8c23dcae80f7e24a38272bf3821ed8663c5532d59b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE02300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7000ed64aa8bf88a09e865685751c2c6c50d98b584f5d08d9b5f49d1e1c448f2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPTE02201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548f20c01a83c1e37bdd8083cf11daf571489fb27cc3001ae0239fd1ea7bfa2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPTE02307240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3245f13e39a299bda3b74f2807b88b9b719e37a2fa44ffa6752e5ca4a0b772. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE02400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa7ff0e4b75f0e5a32e80928b0e29dd1a56d0cfe2e5b9457b2fa5c928fbfc1d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPTE02500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548f20c01a83c1e37bdd8083cf11daf571489fb27cc3001ae0239fd1ea7bfa2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPTE02307240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6207810b102f2d863c6bd31cd3f3a538198375946cb85edd2fd20fb11642589c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPTE02500890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e9efdf3e97658d07703d18b152e56e01c661f9ba328f238a770644b00ed3d4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPTE02500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff35f0a0e85b2699a64a3ecf3a6f448b29204f6bf2c5de287841010f03fff1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPTE02500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3245f13e39a299bda3b74f2807b88b9b719e37a2fa44ffa6752e5ca4a0b772. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPTE02400430.