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 0x92d03afd79df63cc60c24e36fa7688d9e37721ab7bdda0454bc1e7cb877cb3fe. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98570331-46d7-42c4-b258-86f2618828d6.json and https://artists.proofprofile.net/proofs/artist/98570331-46d7-42c4-b258-86f2618828d6.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 0x600bc5586153cfc763911b7035a24ba0c1b5458c6698b70cdc9a72b38b2778be. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZNJW2479488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a867075375783ff3ba49c8c69b6fe79c86ff793adfea87e38b19635452d3e. 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/BX4KX2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764bccf953ea79ec582ccb630228bf13579b2947fc26f8e21d4c99c586eeffbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRTRB2303223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe9ee4f111af0eca183390bcfa5c47d6ecc2f2c5e3484161bdd799053a47751. 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/BRTRB2303224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e49370c43143c42f374afa266b36ba4fa48ba576c8f35751bd62d2f8be804. 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/BRTRB2303225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99c00b319836c1a2d73bcd156d4284259e04f34610ba59058876452ed281af6. 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/BRTRB2303226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8a51d4f07b72a33ff42bbeeaf033e5b6a448a4a7018d40d8b9a7f64f28271. 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/BRTRB2303229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3230626d71ad6ed0dddca2cf8c635c622bcf6f09507f8830e88a3ede714e4. 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/QZW9M2217688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd790d8e61d1fa37d930940d3ab44600cba7b8376b32d225725b844f4c25ab993. 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/BX4KX2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e454be94aa567243c660752a61c3ffa12a528789597b18d9e8d5988148bd6f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:23:40Z), 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/BX4KX2400057.
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 0x9d32d88bcee20f63668e0146cb745d597ccee30bbe9d822697569dead4e1cba5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:49:04Z), 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/BX4KX2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47a063207bbb0988039a46c0731c0028884dff28d7831c44fd10af74093dfd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZGLM2398872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411a3a0b7746deb8683e18503fbde0c47f852eddcd5e5c5c2941fc8395cc0e8e. 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/BX4KX2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6c0ec9bb128fd9c4cc5eb9ac8bc15eecb3a81d93a6f5ab8906367141d8c8ef. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BX4KX2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5299736a1ebfea58c91061a67337dfcb159a6f01cda870a04afe746f6812d8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BX4KX2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797b13b0c4d818dff8cb91f1bb32665170b520f16be448ff783aab7faf66b25. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BX4KX2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52c7703efe3124b5520d2075c91b0e9e4fab4cfc3d7db82495dc619153acd2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX4KX2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d32bab7520d575a0cc3a22e180629d2d8944e6992f9ed4aa844209b6b98c6c0. 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/BX4KX2400060.