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 0x16f256515f0cd2dba37eed54b2cd648229fb59f49f70f68a72b04ecc2622bd57. 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/f160b2a3-97d9-4e6b-91c1-c220a6b6a419.json and https://artists.proofprofile.net/proofs/artist/f160b2a3-97d9-4e6b-91c1-c220a6b6a419.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 0xa6665a960fba418b6430849f72172b5ec88cd3300a011b0db8fe9fa89a6046ab. 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/QMANG2228416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcbe066398db5ea5cdcfcbd77b5773defc8a8b3583f8fec7899be1f1008fad. 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/USUM72403466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856da37ac3fc4c1fef3fc07de238d85ee2edb037e0322c66236768e96a1de992. 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/USUM72303348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f3de2ae99c331f3dd32baa776c1c4801c7e6b85056fc77d5e4c653f2e818b. 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/USUM72303351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a2db5f810c7f68cd06e95b74ede6ecdadaef3cccfe9bb7cf88f97c7819261. 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/USUM72109405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3485ad1e8ccffe58e25458a41f614a0088f0ad7698e5cfc5180484758e10a73a. 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/USUM72403474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c641053f19137735e626f237ec3e3cd45c973e722f5c71913c16b1446dd82. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUM72303352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f3de2ae99c331f3dd32baa776c1c4801c7e6b85056fc77d5e4c653f2e818b. 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/USUM72303351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ec622f3cb6186c519941aeb94c26e08a225587602ddf573d3e0a3f5ac8a21. 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/USUM72120434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcbe066398db5ea5cdcfcbd77b5773defc8a8b3583f8fec7899be1f1008fad. 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/USUM72403466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20bd2e2671758de049d68ab1446683165ebffce09c9a49fc42b8425ae09fee5. 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/USUM72403469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3485ad1e8ccffe58e25458a41f614a0088f0ad7698e5cfc5180484758e10a73a. 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/USUM72403474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507d5e613a31aa3fa762e781082a254566c595e0d2707d31ebcf8872fc41374d. 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/USUM72403478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f0ff7c910b43cec0ae2cd95931ad1b4703c8ab98eea55e5e5a159d1bc82b3. 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/QM4TW2577326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31121c958ed71a1d337c382bb00c0c1ffa2c4bda73d254696107de19d38044f2. 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/QMFME2412255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507d5e613a31aa3fa762e781082a254566c595e0d2707d31ebcf8872fc41374d. 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/USUM72403478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ec622f3cb6186c519941aeb94c26e08a225587602ddf573d3e0a3f5ac8a21. 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/USUM72120434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53669cdaabda1486f943053ffc35e26dc0ba7eb2a68f38181f77674f47435f50. 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/USUM72123008.