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 0x5a1c173ac4980d1020194c16f760c844be6f54acbb5c85eab9085be02cfe402c. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c27534c2-0776-42fc-bf26-3d52556c3ed5.json and https://artists.proofprofile.net/proofs/artist/c27534c2-0776-42fc-bf26-3d52556c3ed5.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 0x7a418b129bad0b74c45f5035cf0937266bd9c4a72f26ba210689e845a9db7e68. 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/QZTB62381897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a91f60429901e84bb486cf20437e66149805bc0f3b20395127f1f888bbbab. 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/QZTBE2446537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6b0fa65075cf02866cec1d279a7a0a639d98ae1e944040b7143c25bed0ceb. 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/QZTBE2446540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc2ceb87f0ebaa104fe08533b2690e9bca3c7dfa09040a86740e804538e3729. 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/QZTAZ2463180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0274516cd9de7eef8faf0ce454dda1c74a0fed830dbb52ed9582ee92899a7b0a. 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/QZES92597384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a56a1e55ddc68ebf145259cc096bb3a18b2903158ce7f6e784883c07eef2a. 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/QT4K52562006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc16e3ae658505c81654e01daed3fce92a226150f8c7dd906c912df481860de0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K52542546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a348939cb2748b49ac0dd57405e68b6896292874f0b6204af22406686aeedbd. 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/QT4K52562679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fea32ecd89f4c22ebe7849ab6cf54a550d74498cb52c69daed450591c013c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT4K52540955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bfcf14eda0bfc1461100871bcc39100bc468d70c5f08881c85d921817d8c7a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT4K52560278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ea3a42884e2714687ef45cc27d90df5674f6d611499a750608b01b11dd3a1. 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/QT4K42508785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b2dbecb92a96c7d16393c9ec73a30dd13226f6d92df60e228b98ee1edfb40. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT4K42547008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530583bbb7eafdfde9acf3c05da491437d0daec550efa6d480e06a71433c6a14. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:20Z), 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/QT4K42564485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496d87c757a4fa03643e9ee111e64e74b0b0311fb867dd2ab147aa6dcc966b72. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT4K42580526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41598bda5fa8caf7013dd6151af657ba98789f087f1425cf8ff43b3432063905. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT62U2548429.