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 0xfa9419fe57bbe4ff10f6043ffa161398e6377373e2cbc631e6ae6747dba13b64. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a430f7d6-5f66-4a5a-807f-5813ebdda196.json and https://artists.proofprofile.net/proofs/artist/a430f7d6-5f66-4a5a-807f-5813ebdda196.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 0x570cbd8541e56b5f84019e216a7b8c5f6c7d99805a2c34de115efec2c0daa18e. 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/QZMEN2388772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de185f49fff9cdc3d697f1ed41f310eb6514895dcb83c8e693d877c202490d. 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/QZMEN2388774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc96c010278e031183a19c84e2030275544085532a3d9ecf13c1d900f75795. 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/QZMEN2388776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fca7f5730efbeba38fbe29e53e6028e9475c131ca3add462bec97d691fcdd3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEN2388777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0a677f76dbf8a717152f579dbb39450128338e6a36c86287cdbc29f9a12021. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEN2388778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8c0a7951528a6b9287e308ac24037dcfde031527de46c103ce10fa977519b. 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/QZMEN2388779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa8d6e716efca69e65ec3b5d4c34e77da358c7b2254f107c1b6d719ddef71c. 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/QZTB62209545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0497e457eb6f4f9a5eb6571e239e338c34fca40556c647e954b239b001c785b. 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/QZTB62209546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c80781f37fb64e0b0f5cb61aaaaabc9ba7a3b5cea346644a0d8e27d743e38. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB62209549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee81c65ed2727d66c78a6a39b9eff3912c0dff2bb724c185a1cb7def325dac3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP42250610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660cc875d79ddabbc7be4245eebbdcb10c37b25db92285314fff685095227fe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWR2258077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08023a94ac7093e00b5a756a27fe033be464eae99e8080a0089001f8de3fb133. 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/QZNWR2258078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc762c0379ad5172b61d3c6c9835e96de3a59a16606ec53818c55334682bc3. 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/QZNWR2258079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087576fedc76470467697fb364e029dc7e63092e6ce3811d56a5e268ca57c935. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWR2258080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfffeb868018fb15b7749657267913da9d275dd442bb9f78007b8dd9a1e1ddb. 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/QZNWS2233611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f65d9eff9b8d017df3c62b3e4a7b5f6c3624a3d358faa9732994fc0458c5c. 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/QZNWS2233612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d0136ff9640e3e9864ffdccf8225197a1a3ce873b369150d367f39efeac1b. 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/QZNWR2258087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a725387ecef85ad6b27689006ab8a97d2ec63fab804e8ab74911edf68cae861. 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/QZNWR2258088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819cc2d8aafbde66bd3654c988fa2853180b703b1a9b10d8576e4750147c09f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES62350743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aa343ebf0f8ef068e10dbe79cd708cfb0d409815fd5b8cf62e3ecbecdb1c42. 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/QZDA82386794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee81c65ed2727d66c78a6a39b9eff3912c0dff2bb724c185a1cb7def325dac3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZRP42250610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62637322ba43f675c31bc86d756bfb97320dc6c76c09d14f51870300494f2058. 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/QZES72237113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb44be79cba4eb7a50343a42439fff389fbb628d81dbf64b0c1321146f0aaad. 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/QZTAS2136766.