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 0x0489f17a1ddd9b830575fe3c437dbf98c2e363cd2e874b10c871797d82c9f5f5. 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/2fd7c585-374a-4e81-81f4-5f8cb9a09a49.json and https://artists.proofprofile.net/proofs/artist/2fd7c585-374a-4e81-81f4-5f8cb9a09a49.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 0x00dd024abf5167246f2b1d5cd75d83db2720c2388c1aa6e8ad5875a0b1c8f921. 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/QZCPF1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa864daa3d0cddadb1c3c1111ac4c0afb2016b6b36a86cceefd47108cad4f4d83. 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/QZCPF1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39120690c3a327f86318696e162814bf3f70788e017e8800c0d4e9d7cd32a895. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZCPF1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d84be991ee587b197c65f787b2dea6c0537710fc76f5ccac44e5546396cba6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZCPF1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99757f7b1b484ddc6f932287f51e6d87f58c274ac26ab4197ed5552f3bb5cc. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZ3AK2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83669440f196281efaf977cfe9739dee6545fc433b05474d8ba5d85e67e80e79. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ3AK2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c5c6371d42ff68288addb9e3a41b1af0f0a02310d69fdd5933e54ce128348. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ3AK2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1868aea1c14a89e8b6721693be179e4558a6d5b1a8346914093859fb715c676. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZ3AK2300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bde583ae2ce97925c2c25fef33319174b6fb47758095944214c38774f69c75e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZ3AK2300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d150d970903a9a659991c7ae8cac88b8545d3223458c8bd7bf0a2c6766a3249. 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/QZ3AK2300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ccb87a9e89827b1710af7f7973af8f3c471af47764e47006a369045617e9f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZ3AK2300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c81f655dde70d6c4f16a515bbe66a1f4083c0630294b6d951b8c7aa807d858. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEJ1902980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c4feea3cdb80fa79532d4bfaec0bde18f1c9774e02b539472bf289486f9f. 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/QM24S2404727.
Sending Money And Stems (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ea03b8fef35b6e793bbb3ac6e550345c1fb35a455524bee1dd5a149a2dc29c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QM24S2406016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64377b695d8dd641739e9dc0f8a34a9839e0ebc7030099594a8833e8ecf2a358. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QM24S2406017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04710de251c80d8099b079a17439724f2292ebc1f7ce39cf8dd63e6000904613. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QM24S2501052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4392559b60a609565d08050fdbc3a0119cdc3eafb6b9c84bca6a63f6cf3727b. 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/QM24S2501023.