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 0x4647bfd0d4d0b5bb8f834114ffcb00fa7e104918e0a82894b4283f1331ca7ffc. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ecc9f1f-3e89-4a0e-a0fd-f27a434b047e.json and https://artists.proofprofile.net/proofs/artist/5ecc9f1f-3e89-4a0e-a0fd-f27a434b047e.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 0x13577fac57802617d81b6a9a6af2a032d64dbb7a674916c7ce92adcc4a215ae0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2375898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e37d6967f07858f7440d2128ace7af2230841dcacbed672b299e574e9e21bef. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLFP2391675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033e94d55a066181b6b73e3d51fc09ae57f77548af07c2c4b8e1119e7277a2ed. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBLFP2398891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4873366799107864177f1de463cc0abf483d3274fa31e3cc379c5c9518b7654c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:41:01Z), 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/GBLFP2398892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daae1af0b57dd991e4215afa2e9eb5b1fc60b423dcaf1cf26d492af7a48727f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLFP2398893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17dd71bca03127934639b78a3b87d670cfbe4cebd3ccf3e00a897dac2334699. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/UKXN22320510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51574491212c877e2379f728f420cbb8834d202cf11f33e86bab0d7cb3f5aee. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:22Z), 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/UKXN22320511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e629237fde41ad2d75fb3892ff742a030d23cc7299f24400b1b7c9d3a85f93. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/UKXN22320512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478af51f0fc90c4c65a1dbf52b390e16bded60105537a54395b575fefe06faa5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:56Z), 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/UKXN22320513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41b683e778a114549ca395921442c5bcf550249ac3bac49f12e8c2c3127f270. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZHNB2474366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1815c80c6956937ba4c34183702cdb679251c8b0b8ed878ea7c3e808c882e25. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZHNB2474367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc052f648ee4ecca4ffdd31781acd73960d0cd22c21f17830c687acbfb51e9e4e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:03Z), 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/QZHNB2474368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89713b7ca94f6b8772decd5d21c8b63dd1e7ae3bd733f89ef1e8397728734d64. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:46Z), 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/QZHNB2474370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf138477ec9119ae8e668b7baa9f7f60022c65ed5ea9ce8bbfb23075171ac4327. 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/QZHNB2474372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae4b00f512bc459d55d471517de3adc36a5ffb3099f9250ecf48018f889742d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX3Q92498219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6829209d92be9412e2fc9909509d185f53768cb6f8fab3555fb1c750cbfbc51. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX3Q92498220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ee96f7488cd7fda0b704243e0231a797c76e4d7fb11c789e77b6c53758ef8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX3Q92498221.