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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def8a3ff72332f335df9e19d2d7605d72d8f62c6756b0327a4c639099aeeab1. 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/38bdaab8-0a9e-48bf-a005-97bc2f9a9d84.json and https://artists.proofprofile.net/proofs/artist/38bdaab8-0a9e-48bf-a005-97bc2f9a9d84.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8042fe94074b625a3f01a9304000b9252a61b3c25532b1046760a3a9b5aa3c97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6Q2026761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc8f2db5b1fec0facb100b6e19b5ec58f9d2cfa6cfbb41f2dd35ff6bea00f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2026762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139450c664410d2a5ad2bf1f61f0445072e2a5dfc9ee617901f633e11d77d0d. 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/QZK6Q2026763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0632f6dd44da87d85be0f3e4046d6ca213b55983081b1644e0ed857f1476a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2026764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da07f0d0090a1e3d263dd71eb3cc6ea866c0eed624ff4be8a804a2c5193f7d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6Q2026765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ed685b2ebd80863f9059092f3cc65529bbe1725b99ad1cf3b89958731af12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6Q2026766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7dc59c3ac62d5d272e06cf5cabe0b9c591875b662f84e68f31a066a96f696. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2026767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce001283bff2d1ebe2390efd3f3d3cfd887025f00a82ed9c3d32ff9eb89087. 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/QZK6Q2026768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c5be2efe682f829cbb6a8d36cb9812453e0e5c586a79fb98cbeda8a4c7a2e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2026769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8843077eb24457dffcd726e3eac1b321774945f9e563606658c33b1e33330. 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/QZK6Q2026770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae0f85454c5f28355372ac6617c6420931989313a5570d374cddaff4d07cc5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2026771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0340e3fce26cf2552b4bfbb967ac59eab9545f1ac295b1a08c57c3289360752. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACU1651755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88131a4d36262a054e1f48392b2fa2cfb6b9f271b7c1fdb2dc2e7cb2eeee66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACU1651758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72d85584f87429901f92aa521ac1630670be90f127ca6d8d54a6a301bd88f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACU1651760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3b784515164138315510f68b5a60d4103857c0e33f0c9010ba14d81df4b8a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACU1651762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d12534c78721f4de1afbfa07c0d9b19cf635f1f949f64691d197168fd824a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACU1651768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f925f70b04d8880a4168faa5967ca23707817d3f57f0375ab65a3676c1e47. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACU1651779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27c5a94544ab8afefef525d6094569846dff508a8e5bdab73896b6ef5fa9ce9. 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/TCACU1651781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ba572905cfd856f966098e804df7bae73d9bc7f401a478869c047e1daf4c1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACU1651785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f42815ea81f780bde558b927dc34a1abb31653878e8c2aa8a9654753a6136. 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/TCACU1651787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6314b1d3d8955431d8e3efcde5a1e4b4a4f9a8030027d53dec14a08f41b2844. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACU1651789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6fff261e05b12bf32c932f8cecc4fb55ed32c39bc58d7e044d0c23ea0bd2d3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZK6F2233886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e37098ee4d0a2b103f408ace5d5709d5cffc216b6ab71acee10baff453fc94. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZK6F2233887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32038e0477805776601b366f77a4615f9d4be6d8debbce23b433fbc3f30350. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6F2233888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514d9006f844412d057af4b2c7290209332a8946134b570567e0e6db7f249d3e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN52026371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de693b7c80854d4ae299013bc471a867536771466e6f5ff7ee7067985f60316. 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/QZES62027459.