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 0x8f438314816c7c784f330c927caaa2c6839bc88393b5a600daf225f3d3e1467c. 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/31d48a89-c5e2-4eb7-8d40-0194acb9f103.json and https://artists.proofprofile.net/proofs/artist/31d48a89-c5e2-4eb7-8d40-0194acb9f103.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 0x9ea371005695173a42aa0fa9ec96235d8bf18f14d21c099c8ba6db1bc191e1c0. 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/QZHN62155564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ed95450ae37234cdc092cc09cd566411eff2737fd8b72f355cd8ae2e50541. 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/QZNWY2271311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d62139e3f3af3b1a994ea79d6a06d0c79dca177951dfd0439901e5bac761fe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:01Z), 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/QZTB32239373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472eb593814f75fc64cfe40cd91aa9c9fa11bb73da89ba26fce5ebfb1663ae1a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB62269643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9565a5b4aba2887b55d902817bda2fb05a49801a1d0d86d83731399f3efe9870. 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/QZTB62269644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6403546c6d9e91f59f8b46b22bcc2ef57f69e47c9650fd7d5e83dee48fea939. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:09Z), 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/QZTB52296694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b10eb1cc326c88ef564f64ec4851551d3e2de2ca283e36912dedd4dfc51f881. 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/QZTB62269645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5456f70f7cc10c8ffdc132ee9ce428e7c98449338d751962f2f81ee3ea32cc9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTB62269646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9086aed0c3380d20aa21b71b308d94fd00ec0e6bff0e31d92645c5ebe34dddf8. 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/QZK6G2319464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46891b8467b816c967dd92ce9882b7f3904cb5e65538e68691a41c4957d139dd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6G2306599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee4f319a18909a055e72692c459e557abdb4985c26c7104c190a342c29db107. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6G2319465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c23f3b1146a286de1a7060e4004cbd318acaaeff416014e3c1544cd58c41aa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6G2319466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ba4d22c74f8f0f1ba7774aeee47631e41ec87309ba2ac8559ec65c6d0efff. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:42Z), 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/QZK6G2319468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb939ddcb90e42d1166aa88003a8e9f4ba478640b4ab02a439e2040893dc03cdb. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZK6G2319469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f2ab79eec34b4986d0a72f2e2de59c977be6b117ed24a7f719ce6471ba3d14. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6G2319472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ef3fc3487f3f75c7f2e71335934a0637b29814d44e30e044ccbc7ce493815a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62429046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde763f56eac62822535f5ebdebb4a8ed7bbcb4e42b1f5682054c06a01c477215. 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/QZNWZ2464177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347fa15df584ffe0601a7e36e9d6aa8fc04687f5ea9d0dc3c0a87cc9c4ffe4c8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWZ2464179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6b8b54052858e3cb35cff878777224766592cdca53919be21ed01c4d6583f. 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/QZNWZ2464182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d562928d34c61b1bbb068c46ede25e398c20de8e67fbc5c1350430904cb48b. 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/QZNWZ2464183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28ba39d8bcb6fdca2194ef7f45ad3113af1c02b10d41657ff77f1313d4d18c7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:43Z), 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/QZNWZ2464184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25123146c7ea33f5d01c8ec772ea1ae1a5b3d938dd062fdc1ded51381a2d236. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZRP52471262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a168c2b446a4634363ba045a29a78823243764106ee65041ba0c4d5e3ba3c6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAX2438011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95cd5a9e30ebe445c25e70bffc9ed2e2f2cd56d5fbe98b4178fe0015ac28f77. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:09Z), 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/QZTB72400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35232a81d31ab7cf99056596a631159b9677cd9cee8304564b5eab828e2d1b7f. 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/QZWFW2467298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b4100470254ae88848fe141b849fa88ad3e2f156dbaa1c5f56b86dd24fa215. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWFW2467299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f7d4af8bd94b5590d8374a6e6dd8caef1b4910bdb390dd651be98a34a6a78. 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/QZZ772457801.