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 0xc6670aea095370049b6b8dd09f2de9f81b8eb6961a41eeda799ebb159f7ec437. 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/ac4e104a-5636-467c-80b6-500dc710cddc.json and https://artists.proofprofile.net/proofs/artist/ac4e104a-5636-467c-80b6-500dc710cddc.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 0x215c7e6db429a944c4757b29803e6fd903264931ae3592d52a54aa7a42fd54d4. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:53:09Z), 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/TCAEA1963507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052df640b909f9a85ee7e68e3762a4d6c99a7ce1cc09e8ea53ec682bcd4f1700. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZJDZ2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8256421ce65656125c564d0ae7ec9cfb2ad3253bbf2243037b98b77bf9050fb9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZJDZ2000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaa1fdb3212efb1d960431f9c785249fdb4ff05af9281253d28089adf317e34. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZJDZ2000448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da048badf305ddd8cb6fc2c83df9cfb5b57e351887d07cb3e412614bf6e6438. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:36Z), 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/QZJDZ2100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3904cbb23246a956886021aab68eed3c7e331622ed3d62c73563100ba2f947. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZJDZ2101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0d1b3ba636ed78db52cfb101c1a34cff85b2893b65783e816e4f576ec7a0d0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZJDZ2101630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a88a731295f8f6920446ededacd3dc7f62e293bfe722958d9314a856f0ebb54. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZJDZ2101632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef8930e8280b51cee40156af249cc3e9e958d3c5ab4fe2f309775c6b8e1b45. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZJDZ2102006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85e93415b403d9723add5963e44b021e9dfb37fd224d38f525ff0db93d33ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZJDZ2102272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5360ae33f302c377fcb1abe58e4952c0cd96d88a1ff119225f519025d978a193. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:15Z), 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/QZJDZ2102898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593630f8d2ada9a2ccf74c332fbf51f75a02ecff7921f02cf4cc823f7a0db1a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJDZ2102900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80a78a137cdd75e0b5ac50eaaaabd3b26c9b679c3f693287819b1b8b1a4f37. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJDZ2103101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0284f5d9015d147f23403603805e059653671bbbeff20edbefcba0fc8f5a9b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZJDZ2103723.