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 0x02cb83a9b3000397bb9853e28712cce43d9e2ae00f0e8130f436b87c677cee08. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7d55e7f-5670-4775-9fa3-6a348cf8312d.json and https://artists.proofprofile.net/proofs/artist/a7d55e7f-5670-4775-9fa3-6a348cf8312d.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 0xdcf4bc16e7ef0987b3f9f6aa539d3565f58061bfe0e494fac4426ab473951f5c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTB62428287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9d6e16433afc35c6dc57e8200367dd8c659c1c0c362ac4b02943e7aaf2053. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZRP42288919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd54ce7d356f2f6e3add51ae821583dc765bb42e03ffde080e754efc4d02e95f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2401397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024630c705d4c56b61278ac533f5277b0389a62d6367cb9d86a2c9d1090f9f6b. 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/QZDA42547466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bb00cb863eef522af7ee62a4da7f644be089ff207f30dd4bb853e0560d374. 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/QZDA42547467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb1b1b7c833562964aa9d165bf2872a91348247c3af83e4606e59a765ecf75. 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/QZDA42547468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57296958919c2c2a2c89152224ce60f4344d414ae1d4559e5d51666d0cf2228b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZDA42547469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741566e3880d2988e9ec3586219194ca04d9dfb2de13762b2107d01f9741c060. 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/QZDA42547470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf6b9676de30d015c6f8892272fdfba4d88421d4ac8ccb4bbd05972118e04b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA42547471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93e7314faea8429fcaac34f58aa4665ae154eac248cc412e70e7c7bab82f8e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA42547472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5f4d78da3e06b89974a532a89243123401e5db6f8c3ced96c54b849c73fdd. 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/QZDA42547473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22914e8c307e1dd66d9e32643c278fb82bd095bae0eeb19deaeca514093cfb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZDA42547474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b07b361c0fab391431781b69e07ed089a1bde149e4fe41e86cbfa2cd8f8b4f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZDA42547475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf5bdced80f853c4e64826cbaf38009c6ece408097e13403dbd27c8113c3db. 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/QZDA42547476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fe7f5bdf2bc7363d96ebdb7a3858f6a0acf2870a544605efe3aac78efd2444. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZDA42547477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f3172d2e11a38bba6baa521521dcc3d8192818b8a1ba0ed135679ab759c6c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDA42547478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602708e5eceadc07808c33a9484045e5507ef6cc30894b029155e9180e4e0ae1. 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/QZDA42547479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea98f1ea9d61658796c6c278c75950229a5ead8b73a28106dc61c68cd8218c0d. 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/QZTBF2333309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0b00b1efc524a2fef3fc5d105fd899bc40a0b2dd607e9939c531cc55ce2ff. 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/QZTBF2333310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997c49619c263aece1d1effd4b0a250af54e1e755c01e68e409fb2728bbb8f91. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTBF2333311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6377ffc91a95707db86dd331d4f4da1d28011b79d48ad92e5bb6d2925cbad067. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTBF2328365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b070a5917efec07fad5edc7e7022a112e617c68c8a938938dc404d6fbf36f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTBF2333312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8fbb3e494da22b3c74d6cd9e4532a1bd598a46052b96a97d2d834497ce3093. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZTBF2333314.
STEEL-TIPPED BEAR'S CLAW! 2: Phantasmagoria