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 0xdb8ef453bbfcf875218d6600f1298ca132ab79f0b06040fd1eba82be02523f94. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbf0a62c-005f-4bfe-b576-6b3e24585100.json and https://artists.proofprofile.net/proofs/artist/fbf0a62c-005f-4bfe-b576-6b3e24585100.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 0xe4fb214d78f922606981f4ab293d66ca6490d4ed2cca0fc5d853093a3da2b505. 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/UYB141614401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a8730329f86cd3f547226f1509adb9af779d9f715615be8f60e30a9b9b9fa. 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/UYB141614402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d0c9b23994b7fec85c879e07ae9983188faaf475d5a170af8656c2c9102d48. 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/UYB141614403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa055ea89d513edee0b55b10b8b53dafe0e597e1cc94a25e8e83e415b955667af. 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/UYB141614404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b8dd4cf7622ca28e9d2640414cd5e60d3e3e06e7180953a4622d38ab2c8fd3. 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/UYB141614406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110381c8a45481f47a0463365a5cfa58a57467ddfe2ae3e63d130ef014cb76a1. 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/UYB141614408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11cd6c5a57774d1c4149556e5d7258f8853edabbfecdb79e0591d8a08d1ff0d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYB141614409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cd1e5a0d503e51ecff9303452f86bb7c3ccb50ee81f742b6fecdba043915e0. 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/UYB141614410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4e8390e494c98b68520fc8eb29253b34dbea1944f8801386ff846ca4a53c94. 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/UYB141614411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07077725a8430be0593abbda1cc61961212d2051329a3b38a1f674825c571b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UYB141614412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7910fc58a6165f6d7a50c2c5ca7e5d6d453e128a6fc7d336ed4349ed28b1a. 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/UYM121705927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb2e2af7761c049109851554f6add404f40ff654784a83bec404a32219f409. 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/UYM121805641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe806a2db3d5ae7abde0f542aa99f748fedb85553e290a218eac2395572f36af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121902067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041b1379750975b9d06349f3dee840842f17d62439973d393c790bfdc4d41fc. 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/UYM121805640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bd71a9be8ceb9ff6a35969ac5626349bd2c65f942aece1d148e0a86d9b4a11. 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/UYM121500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2439ecb8fe77e892c112a6483a145b96df7ee3d2114049f2d3d3e9068c4c5d1. 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/UYM121500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ebc03dfbd7aaeb7fae420e3ad40cc452c79c19b91d474c77850351246cd92f. 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/UYM121500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa51c3041c43af61807b0d122453239b5e23150f51d288f1b23a1502ed8a69a. 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/UYM121500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63937e676c166739a31af07903507aa32bf7f9aba92b45c4e7f313bb9e51ae8. 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/UYM121701630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d705ada37c5fc915a66667f5e89e81e08b3cb2f637900351f99b6aecbdcd4f5. 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/QMDA71539466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc319b87c50d0e32e7ab4743c15678c45f16f4dfe16aef00825d46010075a5. 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/UYM121701633.