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 0x87c1a463bf41fab59f78df8154c65c15faeb674d0977eea2335d1a94f763eabd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dc39f3f-5a54-485f-a566-4e96c3706c26.json and https://artists.proofprofile.net/proofs/artist/1dc39f3f-5a54-485f-a566-4e96c3706c26.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 0xce4ef80d17f2352f564e5074764064db63ec940cdc8494e4e87a790600fde71a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWT2322890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d8b7e7e6880a690a015b434413e39e0cd71ec23571cafd553c39f948f62a7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2322892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6354cd9e6efc4cb9d8c7decfdd60d3ecc487421e2e44b542653274c76cbf6c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2322893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a5e9b969686491240d74b646de20e73065c2b87caae513b1b97aa3ea7ab67b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2322894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1574b048aadfda1570efde20e5b11c5d1607423c742171ae98090593c1288. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWT2322896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba96aa325ba42a732d8ff9ec5db5b5f953cc6bcaf3e1d0d28530e25cc6f7125. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWY2331118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1070fd1840b560953744c3711bc2d28da5590f6f96a019f819af06b1e7870b8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNWY2331119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498df1dfbf0db8c4eead53b0e59f51f15949d2a68b729ebd012b83d86f2af6f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWY2331120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf688103a27ea5dfb4352eb18aee59eb6e26f50ab99b0294bafafd5fe45fbd75. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFF2300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381161b4c2f54d866ef29467d921fbfc730d483a3be6c794f5c427ed000ec480. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:50Z), 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/QZWFF2300738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08fb06442b0b6fe7f084b740f33c1c3aaf08592960bd993786f063eaf31c2c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFF2300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff052548ab0af6b1d0adf07eb01c7f025e3190749bca2e520ff46303114917. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFF2300740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6a710f9a7f63cb555f858ce435753d9af0f282096a951a114595ea7a6891d3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFF2300741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9a257d9869ee64dc82864d1a6aaaef56e58c5a03163ccb83990bf8ebe8a7e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN72564361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48619f7a43a129e9400533a3011f6300c0702db79454a061cf57720519db1d9f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN72564362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495284a490ab1e40f1ded1a5372426675ddb0ec844e1466115b1eb6f96f34c46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN72564363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca758b6a6319cae333e70bc91387b0cf65e8d1ddd5c2c39e7475aceb5d1e2c6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:53Z), 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/QZHN72564364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfce9b8a3ef03326d24ccfaef9a5ed743d48832f8cf5ba7e8e9deeccd27622a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN72564365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63101fe57e1ebc77fcfef3674791bde99210f43ddc7e603e58cbfee6e51ecee0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:53Z), 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/QZHN72564366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724ee10402cd408aa4978bc99488314363f6cc42f7f102c01673cb4cb1c1e4b0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN72564367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180424b398cf727f8209971bee38575b15acf7e9a43812f58fc23679ce442fc. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN72564368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b64618a0814801813b3aa4d07ec479407d65e61a9d1289f807240cbf9218933. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN72564369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4eef46f8168ad8cb5437aa187c258a82cb39e38aa1d9b3c15e270e7cc8bff5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN72564370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe46a6b8f5c348e0403a1766b4828cad098945a1c05d7f32d0c422605f2e43ef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72564371.