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 0xe3208661a8641abd9ec2d0d20e8891a64fd41ecd8aae10347a1a0418f03fcb9b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66b78be5-4ae6-416c-b487-098e6716d665.json and https://artists.proofprofile.net/proofs/artist/66b78be5-4ae6-416c-b487-098e6716d665.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 0x25a4648c25a280fbb698ef7f93d3eed7acecb69c78f816d4d0072085077f3f9b. 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/QZPJ32207123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194957ffaf7152ba3d8c73f94a56d34c5b284d51252b72429f8b243b2ba4af15. 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/QZPJ32204293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a4648c25a280fbb698ef7f93d3eed7acecb69c78f816d4d0072085077f3f9b. 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/QZPJ32207123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798f85b949ad2540ac8ab63b19efe08c1a430286d2a9943083eb3d7ca4e8bc9b. 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/QZW9K2350438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde3cdd86bf8c8ad592717c9f6edb4cddcad68fa0e4c05607b5e1e98092b5f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SGB502259209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e7e98c1d2e68fda2775bfc06affd613e578f002de5e20524cbd6ffaf7cd41. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXKG22300669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8cb3fc1a8409dcfbdac8e3610be247974507b6c92b35007c4c26f059126ef2. 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/BCSPP2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c075e16230befce0879b56290ee035701251e4f368b29976c288fe27dbf1fde. 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/BRWMB2200927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190a65bd4e8aaf0a9b75a9763804c02f3f5a44814ac883ba7b2965c4288a7c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZEQU2211982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb3b0fb5408c021c1584ccbe2cb8c0b24af8dbbc39b825a7f8ebb8e89e411c. 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/BRWMB2200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9df7ecdc42b422acd587b768d672442d729dd7835f55b072c3efbd4e1037fd. 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/BRWMB2200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07760ec42fe899645bea8b092b2ef5eda80ebd37531131097af562e3df2341f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRWMB2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029c1accc8ac7ef7dc46f253abf7898cfbef0bdf2318421d4e45c78fc029e0f. 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/QZTPX2124337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cefb888710116fd915bd7e927b791915d1075ce50afe788f4ccf42f084e9e0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRWMB2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba41d0a39578af4927422abc2472b0a908e5f43512d2bb67b37c8f47bed7f41. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM3DF2182327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a0ad5df4bb5cbbf229347469bda18e1b1201870b0ea76555376748efc60c43. 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/BRWMB2100960.
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