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 0xa2cc86838279ceb473969e119c6b62edace3665d24bf7c9edfcc2dc0c72d8f1b. 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/77f889d1-5e7a-4b94-a41f-115b04bd5034.json and https://artists.proofprofile.net/proofs/artist/77f889d1-5e7a-4b94-a41f-115b04bd5034.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 0x6512a8d9ee6682b74cc750d65daf61e5aa3283bd838e474ed81b85368a85cf79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:02Z), 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/GBJRZ2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeabf927f0476336539296e994f12a269a96baa358258b949a9f79c7fca4c730. 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/GBJRZ2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53735d144aa45e77f7119964a6da7b66be33e42670a4b6f1aff441f260fa7781. 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/QZK6K2431721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03beefa19cfdfe0fa118473ffd7f68e5022ae2b80ddd132c209c48eb0c2d2cdc. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:52Z), 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/GBJRZ2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160808378dd8dfd9b2c937fa50430c1adb95efb93c7250e9bc854c73f90840cf. 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/GBJRZ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b858bb257cbf420c321b7caf8a9dcfd2df0c13bafbce734c425731bd9c6f21f. 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/GBJRZ2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dec3e7f9a31b0b31d2b0b676cbc3b12d352176f0cfc2f7bb7278ff7c188b4c. 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/GBJRZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcaddd196edd3d0de3988f126a0b9d71e166055e5b2d0a0681d74dd8fe116b7. 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/GBJRZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a489f5fd3acf7283247ff07d2794c6e7c54bd773a7b8e5ef14f9c1f197dd8b. 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/GBJRZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a9040a7623753b1fed31ff7aae8580c55baf0287046c565587aa2dc4b9448. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:01Z), 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/QZK6P2010826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d52deece8af0b2ee2bb668d0947247cb82a0709598f34d326c38a7ff28e915. 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/USUXG1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401a490845a42095019b690543bcb76d140338c8afc5d6f40657e3241d6218d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:48Z), 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/USUXG1100005.
These Flowers of Ours: A Treasury of Witchcraft & Devilry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53735d144aa45e77f7119964a6da7b66be33e42670a4b6f1aff441f260fa7781. 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/QZK6K2431721.
Under My Umbrella / House of the Seventh Moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48dbcaa1b717517ba91432e52d785b80cb7f485547da451a5af41c5fedfee81. 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/USUXG1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfcca942f09429004e056881ad9c995d75bf4f21bc6d55dac7c1f4f04b7312. 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/USUXG1100028.