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 0x3cae38bb20e2011c9cee65a7dd1c0a754bdfe028be53fdc8261e88aadc1f9190. 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/adea4326-c53a-4050-a2a4-1aba874ed12c.json and https://artists.proofprofile.net/proofs/artist/adea4326-c53a-4050-a2a4-1aba874ed12c.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 0x2cd2b988d8bf25a69036670d1721e32c1a2ad962c051f8bb8eba3972ac7bbded. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLD111500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15512a3186862857bc95b8666d7dfb184f2fcfa1ba8c2a997f2c88010f487bd6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PLD111500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c7743f2347a6d548bbba1b6f5436448b58f10f8b768630c5c462741e0e884. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLD111500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb405054deb593da1f64aac72e2e47b9ad00d6e82a795b635e8607bf8e1eecd. 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/PLD111500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c699b7d464dd3e7e8c4615976c157033d0390e40c8e6ac60af9207c9b87e9d8. 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/PLD111500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77014c9a6069361c3014e4253caa005d2b971ba03bd26889a237e66c1a3b6b1a. 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/PLD111500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501cfd2c60c63da5e2de802b0edf50bb5ce194e8aae56f6d7e35fde17be85c0a. 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/PLD111500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96f0f1fbea67a697bacb79523ddca0b4324aeed1af6e7ede6b0c3bd07476b50. 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/PLD111500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97bcaa23fca44c3c5c6caa3c003a97d3c8f6c26af36cbf9d40ddf42f72b48c6. 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/PLD111500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0fba661853782e22b4211ae696a10566d2d4574c6cb771fa2af0c2ce8495c8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PLD111500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827dab9aa032dbd0bbbd44a7a1fe3ce1b450df5c044c2878924590a788403a5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLD111500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b779194039663c518d7b77b41289a5ed987c8eb9cb2a40782e325405d42edc. 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/PLD111500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467fbe05a674623c5c879b84c8eb1081f71984ece01908be39460c55df3c3c7b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLD111800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5cdeada5db442d6716453ac45c12db6cb39dee106426f92fcb25fe87554b3. 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/PLD111700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea59c3fab4dcff404e42ffca90fe6dd5ffebac72098800e038c1b890d090a0. 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/PLD111700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2249c0ba690b1a32955b62384fd650a995af9d8db909cc17635270d32cd2fd. 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/PLD111700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4289947b94c7311261776e2a827b0d5a6bc5a1755bca45c6ad04d4fa02996fa. 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/PLD111700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e85bbc144ea4485cf4936004fe7849ffec9cd36921ddcbd6b2d17f77c7b1f33. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PLI369293710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c33998a24ff7551274d39487620293ff10477eb0debb21f5ca323a89e1892. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/PLA681602059.