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 0x26c3cdd1ba03dde075867a361c6ea447a54f88da878e9506e846223f2ec3034c. 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/0563244a-413b-4619-bc03-3dc75c76843e.json and https://artists.proofprofile.net/proofs/artist/0563244a-413b-4619-bc03-3dc75c76843e.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 0x848300ceb116997ba484f9523640d120b2106f448ae9ee246bb91a03417d7c9f. 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/QMFMF2305434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff3ce2bf87bf119700ca44e128af01b2507610d792431c3a5c0faf481099c1. 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/QMKSC1901491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf51182f2d86c1d6e6d83f96181f9ef7f9b6d8ac40479b3ac40ab8b4fc6c57a5. 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/QMFME2330013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687165f6d94986ec38b75b0659e70adc3b83f9ffd9da3a515bf7b182d21dba04. 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/USLD91747418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7470abbce1b2607a420fdcfaa08467290bb5fb71c42c9e1cc017a73d76f04c. 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/USLD91747419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af86cd59cf1b029bf30551166f2854c2cdcee354a4490806ba0700741b8388c. 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/USLD91747420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446099eb8d947164fd06e8eee6ae6d804c688709d46b976131d51c2e870bc0e0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USLD91747421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc899bfb0d5aef0b01eba109d23fdf00477270ae01e312f32a12172ce7697cc. 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/USLD91747422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a571ddfa7e6fe4a57c0d4d1297a98ca4e709094c1332c17a77247a0b867adf5. 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/USLD91747424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbcb70ac4808ef21f57cf68182972ddf2cfa53c01314cf2d294039d4d72b5a5. 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/USLD91745342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69f8b298852ad02e623e6532ba83c5b4fd0417ef6e0279dec35c1d642b07852. 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/USLD91745344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5651e37842301db51a7c05d559941d3fc0835f0ff1032f026fe98c17de7a2ea0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USLD91745348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010c17e3873b192cccce1e6061b0e4624fba60e5317c87b5388d81bd5149198. 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/QZFZ42229713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34198e10314be88254cd7a42807afa631beffeb9a4901e8507c80285ea070e9. 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/QMKSC1900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e3971be16741d91303e3e3525eca75d9308649566b8d54cf03f6c8cbb5465. 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/QMFMG2323164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf11086b88029bf37658647469c4158300fd8de689776da54e767272e2c390. 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/QMFMG2353317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f3ae428175ba09507b8fd0d5959d78663783cefc555b05d2930a7a54c13745. 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/QZRP42302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3253c72fcb0a47a339075faa528ba3c758b87cd4df6f6af7e0441d5e3130fa. 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/USLD91746988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb8d1f1671a3df7d9432e77cd2cb0270aa5ce7e4eb1f21d5bcfd62cce9452ce. 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/QZRP52110969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54f68104ebcd129142d233d1fafaf0289fa82820d9c16dc691aa6c02c6eeab. 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/QMKSC2101626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8523c48026e24b3d89982794f446f705995590b40033ce5b0062d44d44081a5. 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/US6YF2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa5bf43c690036940f3bf5d8fa3271e40f61991fcf9a307dcf6455484c3fa9. 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/QMKSC1900385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399b9c8f80f6ac920a450e4cb7c796bd6ffd6e21cb86e1ac5e690f3dc2fd038. 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/QZWA32200186.