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 0xbd988a38f58e441cfafb767ecf39daa02060b3bd3bc7c3c46cd158b06bfbe5db. 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/e29472e5-ea05-4517-8372-5b0066cd8ed3.json and https://artists.proofprofile.net/proofs/artist/e29472e5-ea05-4517-8372-5b0066cd8ed3.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 0xde5f22192999de823866f8460befddc7b8a926e8597f6616dcf5eaa465ec0601. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFM2421959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656f01949bf6523650f8ec2b340026e2927eee5f6eb838d291d91fa63d6a2ea2. 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/QZTBC2452641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f281d7604790b6f1994d3ef8b61ac3a031f9115679567e06cc03992eb768f27. 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/QZTB32407340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76a6e69a44432d68e8e873a8072c11470a58b9a9689642845326f992ead45e. 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/QZTAT2485437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32670111e104f72a63c93cc332c126c5842298104034bf6e21a943e42fe6331b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEP2431363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb208ff65990d0c82da3a39e53dcbc3b7281225c432b114372c79afb765837. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6P2440650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9609eaab374d819d585f3635af15e927a65ba0ffadb9660506c0b9924f686. 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/QZES92441221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80420e1609d88c7797f12dabc267c7cfd0c8a47de4913d8f1cbd8482f94c14. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN42415490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca946feefdf0ba676b0f723bba2325dc11a6f1df89899526966ff4bd8a871b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFJ2359919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa627a53d6b2e6edd7c898b8feb36671250e5df7ff2c749eb70852ddfae23c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEM2391315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6999a82a1fc0caf7c228943f3fe7b35c01a8ed16cf41399d25f0e413c4415a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2360775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ba57183e407573c24b03ffd37e455c7f623c3a68736a3a708a833d033d42c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2326195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16411f386e1b2f9b436159ce9d2b5d7e6e54a9d2a7adc17d286a25adabb9ffdb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES82351563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e4fe36a73600d15ac8c6a7a643c0ddef04506eb335a9aebeed0493f62831a. 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/QZDA42305223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24874f16f93a4c6849da5cf4b8378f1f6822c8dea0391709dcf9951627eff489. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAZ2225831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d6e495bb27dea9a2a62e9c52c74ec739c19078aa69f3a9cfdb3d53c513353. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA42371308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58e00188904a6e064fbfbe54c63a328dbfeaa0fdfe7c65b427457814fdf410. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLS2273008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d370f29ed1edab7337bb0171d2c510e4bc4705c7befc8aaf2caaf48c402f74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA42369774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291ce1daee508c93e66c0468457dd9e391a784cc9465081c655676b712cf6a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6J2244015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72fd3ac1a72175bbbbf2a0c39734c666b75cc7a982060d11fa64187aeaa4341. 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/QZK6L2275435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd3d87fb1c76c8f883128b15ef60d97598daa2db8c04e28b91b533de7bd97f5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6L2275436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabe3028b02d496aeddd1e6641fb9d19fb2c5c1f36e0e7bc2ce4a2a1466e7766. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN92202534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d6cee03ab17b1797e6ca6ab1b7f5c71925260467dded5a474693c8c9ed5a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES52289764.