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 0x3d0be21a14ca9a6656cde5bc23b3ac7391bd2adef47fea2a6b4623cd3d0392f8. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42a97e59-df99-4d03-ac41-797175aa8ad0.json and https://artists.proofprofile.net/proofs/artist/42a97e59-df99-4d03-ac41-797175aa8ad0.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 0x2ef30b61f6ac4df8901583f2c8d7353b00376aaa2187c7f2b3162ad2587798df. 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/QZMEQ2177485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c10557e252b22e0c212ec2ad8ac9ad6b1eb9370e6c0ba04c88ee0a52b6732e. 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/QZNWT2112121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cd6a837e40e8fe6303f76282e419a752a04fceeb286606aaea44d883d8d6b6. 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/QZMEQ2177487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bf24c4461aba3a7f998a851690cb03c9b162a6b0b9ff867b29bae5024a8c5d. 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/QZMEQ2177488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e13751bfa7f132503120479ce112bc1f6ea7cb2ee8d6c017e1240b40fcb0762. 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/QZMEQ2177489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee56d0352472757ddeb796f3b0cfb5a2e341451e4ebe54c7ea61c61216ee60. 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/QZMEQ2177490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fca5ec1c90e4da3da0250bf22c9192cfef4e5f1fb59b97b315e62bb2c006cfa. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZMEQ2177491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c3f7df94ef9ce1023ffbb2a9da5ab60daaded7b92c36fc955bac2202089dde. 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/QZMHM2482949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91236d1fd2ea62424e72598b21df3086313ae3466153abd9937a3076e5eb3b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZMHN2344288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04835d48866ac69668a11075ea8c460fbd6aa84a084a60c1c23bc01580390968. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLT2H2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647febcdbf738f2bcdbc19172dd0da01bf193e3a6664bb51ad4792ff925404cc. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CH6542219456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ac5a40e5d356bb89d9c8a606b074835218166dbb125312264441052d602b9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZS632196539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245c9d44d4ba045ca684220fd267256a4f991dda378df912bf4481076ca6357. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHP2027468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8eb11d2a5324ce11a2ef232fdbf1699c74190fd1eb80671d446157c54cf8fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES61A2325814.
FeelQ Recordings Presents : ADE Sampler 2020