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 0xe3d4d10ded58bb6af3aa09f089a8ce164d656981c96c4b3d23c36784f98f131c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5179212-7c51-4ad6-8403-d285abcc6434.json and https://artists.proofprofile.net/proofs/artist/b5179212-7c51-4ad6-8403-d285abcc6434.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 0xf429ecb348747d830f86b5c78a7c09474419dd68cfb787a0a19efccb537b544e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWZ2435715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135b5772233f4d0e80f9ae4ee5505305ab666615cbf5d5ddeb9d4b62ecec1ff. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:39:28Z), 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/QZZ7M2445070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c9471ad7cc35c2fa5a055dd35ae8b050d906d808a06b741fc29836f7d74645. 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/QZZ7W2497599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872c5bd49f9577c2cfeb4940873a85774a47297041839c6c9c1b6217f4b4934. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QT3EZ2425909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7f6f37cb36d59a205c023133ff9938494ac7f790bfc7ab73f9acff42250585. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:06:50Z), 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/QT3F32449914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2f80dff0c60081d20b94adc04c59884374918fe96f9c57acbf1627d5d6036. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ22597844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82456ef9068759dd7ac0ca4c51cc2f28f66012405d08f0896ffb76ae627bb9e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES62523929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f747182ac57afbf7af951d18897fcf4da483c0a7ea67fe018d33bd0eecf90f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:26:04Z), 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/QZHNA2570905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2375f15aab2fc34801fa1c674b88589e37897782018250332705a16dac1c7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:22:47Z), 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/QZK6H2520930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9a5ea49e5330211624df16b049b046e3efe16a4a517d59df93f736796e7a26. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6H2520933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb230ba022db94261d0ee6cdd99a6d8ce37bd470f84f53dbaa5d6ef1ca64b046b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB42554089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7717b62a6bca14e5677908ac46f76b4bd47bd3fb61f1ec1e6143494eb9d505. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:49Z), 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/QZTB42554090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde3b8a40f460c2de26227ec80b7ea2b8950fb7f00d55bbcc951988b63057b33. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:35Z), 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/QZTB42554091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ffd0ff81fe87737fbb83691d7edc63878b533c1599c05becc8aa0a57e93f2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7K2533349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eaa74f90f1df00ea9a27184bd2a22941c17d23e4f936e0c85eabe2c6e30b6f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2529733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd22414a20063b0bbe80988e4c5149725be2accff727ff120398c24b75bfa4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:45Z), 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/QT3F22524717.