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 0x8ffcfc9c3bb0341f7a29573fd4cea67711b69b4efce44e397cb1d9d8f0f18665. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fae3ba05-ea8d-4bc3-ad1e-d317e59999b9.json and https://artists.proofprofile.net/proofs/artist/fae3ba05-ea8d-4bc3-ad1e-d317e59999b9.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 0xafae7cf76fd040cb345bd9d2f5fa5de87a6dcd62e5d8c58b72a129f2350692f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA41881613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08ad287731bd74516fb4236f333d843f304040490f453589efe3e169db1b51a. 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/QZDA51864154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10424d0bc8ce2b2c5ec3b8976a2808fa54a486636a3e187fa85092529840aad0. 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/QZDA51864158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fe46b1020c81929db1347524e0c3638401bad26d69c3f3b40492b73481e1ff. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZDA51864152.
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 0x021956d3332cef02db468f5a6a5792b584f1c0b9dc677c564273f45850a1dbd9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA51921293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fef1e0ead88d18980fa80c70246fc5af6934f983d6572772b43028d8b6b682. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFYX1921601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccb7e6900442a1d3deaeadcdd7a20a390844fc62a03722a57c49098048a1be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42020369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61476b611637c1d2007fbacc4271fe2e730d7132d885cf21ff7b5731c841d246. 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/QM6P42020370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320f6fb3eeb4ec8784cd90c3187b65dafd456743b7828dbfb196aa6bddf64006. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:28Z), 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/QM6P42020371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8579480d198c27f04e9d8ecab472d28601ecb896f9fbc59d381821c8f6c5ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42020372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f26c187be2a22c12faba463ff69ae5f0e063a0913bcedc72d3c756471100674. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6P42020373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bac463db9e0cb9f4cbc2c858b1ed72dd048371878fe1a6f7dadf0900c104131. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42020374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc78ead93c4c19faa181e495a9e71431fe74f91e7b3e5d3eb360a5d3998007d3. 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/QM6P42020375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf96223e67ef40ad983b332ce4d4f6cd7a9157fe2ccbf403b54021a805b82df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN61935957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c323eda33a8793ca64658d5ee76329fc73868938b6cbbdec9c02b0d78d8c0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6P42020376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864bdba9d7ca2d39f12450c96fc83a10db50afd2ffcb4d9b094006ef055adad7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6P42020377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2a9e032a9e97992bd30ba3113f81c2125d7deae129c6c05a606c3b8924aa2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ITB262200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3a460404a392359f4df9ffbaaf7601a037d36f393cb02131689307ec4e45d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ITB262200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6553907d528b8870f35d62bcc1f4b6b778ee7a0ab40f276d95775293ec42354. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITB262200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ce2d813cf7ae7745a0e6e21ff935597eca07870f1ac7ef062f760c8ffd167. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITB262200290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec2a99c13a96cd47a039e41afb0c75f6cc231ff7b6fecb05ade0021afbc8b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITB262200440.