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 0x3fd328c6568284fe27f3a99524861ce027e67f043fc3b860f2a069673abb7546. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fce32e1-42e7-4e6b-a9c2-4cd38f07bc17.json and https://artists.proofprofile.net/proofs/artist/9fce32e1-42e7-4e6b-a9c2-4cd38f07bc17.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 0xfb88187fdca22ed67ec3b62b32547f2846fa433d4c5e7d442fbcf2927848ba87. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZMEQ2093017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc386b8bea7fbc012d8026dcec2c61a35187acba7214eeaf5747022546c756c62. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES82154332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bee1cad392c5c8dcd3df218c4fb8ea4c0d620435a7dd7c932674ee11bf2d6e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6G2126118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d7c20d00ceb2816646f143c0493e79ae2329ccb6edc73a94291cb1839eaf5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWW2214154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd4804462be121b3246bf6541adbd32bf13c03fbab7df8abeb12d4108075240. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:28Z), 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/QZTB62239029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47a082464590cfb2195774375d3742903a76f516ce4302041b0dbe7b5420ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62345786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb572c66598f844dbf8ac8c15dc4fbb35f82e570924ce24f0d336eee6197154. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6L2302366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847a9560e3f04f08502c68e4a309edfb61af6bad39e98c71db94e9fe5a96e16. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/COAF42392379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a5b4b6e52a4736ab59a1f327c8b2f4a8504dad729e80df2fbb83ba2dff0299. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:37Z), 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/COAF42392793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef62a0bee6243f4c713bd09ea432b4339a8c207170903b32dc291f71cd3f0e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWFJ2301709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d3da8f7f18df739f7816a5dcc9df2c1db6f17d36105862b171d596a89ac26. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/COAF42490456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fdb123d850c8a62ade6708a07f53c348b861b3562ff5716b9552debfc8a1b2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/COAF42499436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65f6c2f1a81b31717bb626b36b16229a1e229a17175ceef5257d3a7095c7f7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:55Z), 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/COAF42497013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a21a6e2c706aca1ae6d45a652da36b556b55d6e2b3daa6eb5f2bd11b3baa8d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZZ7R2460840.