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 0x06fe521e82c4b25032add7f77a9213b731873f839f7aaeece50ef2f2c5aeae77. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36205ecb-aa3e-4a0d-8ff3-41fe4cc4be92.json and https://artists.proofprofile.net/proofs/artist/36205ecb-aa3e-4a0d-8ff3-41fe4cc4be92.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 0xb430ecaf24b38c1eed64412f1f52fa98b1d7dd3a1ac2c112b76caa51ff58a444. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZKWA2313466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb5ee04e5b1d97812bdbff342698b13a5c4aa8a348834b1e6e6022710d8c2d2. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZKWA2313472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9856850027b72d443619edc3cf9616dd185bc6e2d88c6a42cf299f1943f8b3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZKWA2313469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c44e2f0bc0b8679d6f140f84f8f6fc98283248a42d2e04f1f97744507072de. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZKWA2313470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a245a703616890f3b7558b3bdcc8e00450a389f8a9940ed612efabeed64bb8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZKWA2313463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dca4427be47bd452c4b40fdad3e3bcb82d76f1621aa65b6a178ca264403802. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZKWA2313465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7efe555a005547a166f62ee31e66e2b445e4939f5b5d0c73040d6a8f2670a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:03Z), 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/QZKWA2313467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15aac04595a6071a20e542221335b989d73827c1a60ae651a058ac7562f4c85. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZKWA2313462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd978169bb917b56193158c3afaa4025022a7493ce7358f6b589a95533d28bd0. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:31:18Z), 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/QZKWA2313473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503dc227e6bcd58d3ef0de5f92dbf83b761f09acfb3b8ded0a54c6861eea5810. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZKWA2313471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e78edfd965f0b914f37860197740336aeb254c9227493be5a18b3d10895296. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZKWA2313468.