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 0x72e92d1cedd31e264cd68101132aca040c589b6b0d46ac8d3a4d68ba29370385. 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/16b53f13-c372-4443-b123-24dc6b66398e.json and https://artists.proofprofile.net/proofs/artist/16b53f13-c372-4443-b123-24dc6b66398e.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 0x0c4d7d5f3fe488059a2b5fe67676bbbcd40db8d623feca56a0c5b021032a8b93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152200616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da5337be247df31267f138663b6a463021c7a5665cd472578c72e81d2481977. 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/USUM72015123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c86ebf0d50aada65fb7144f3e6ad631df41140867dcb8fdc224a966e39670be. 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/MXF152400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db0413a36abf76f84b19855d98f3899c38dafe670fac40e5f242cb7b489d87. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfab823db6d64dc03d977a66bac92e6b82468ba655b4f3ee649c650c3603d8c. 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/MXF152400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bde0b2d0d8ea64ecfb094f4cec2031c96dc853a39f9e3d94245ac3a6a7cf2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb41579710186e6b0043dcf6bb3e0609b33b2414db487dd4805c92513a60cff. 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/MXF152400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7035c80ce83ec107fb5b73294abda3ef2404ae2abcd8bd0e4470f6f97900b19c. 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/MXF152400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef04bf1c5daa29ab7f3467dc421fee6a0512caa756447fb2ba79ecff894f894. 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/MXF152400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ace99d35c3a2455c1e40fd0e8077ccf1f674911824b79d0b403635f78d8c41. 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/MXF152400456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94395f14acf24398dc15b830af63488d97df054d4f9d9a963f72badb23f25445. 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/MXF152400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb41579710186e6b0043dcf6bb3e0609b33b2414db487dd4805c92513a60cff. 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/MXF152400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750edb22d12489170e9767c0efc052c80dee21c143f4a76071438052cb7c722c. 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/USWL12201168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e41f178495ff79c61c9fab097aa201bfaf2eadc2a627e35a7409460d5bd1f. 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/MXF152200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991deb690846f37887841c84bdf0a9552ce3701281453e4efc6d08a501b1507. 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/MXF012100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51706ba3ccd4099d94b22408d7953486e2e2368d384303eb33750ed8ca80e888. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS1961796.