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 0xce5df695fc12f0483b98d0236350c068f104584fb696d2c9fbbd2ca80f48873a. 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/b0e8e172-663a-48c2-9a6d-2dab1948dbf4.json and https://artists.proofprofile.net/proofs/artist/b0e8e172-663a-48c2-9a6d-2dab1948dbf4.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 0x37f962b6e1e54be71535e5464cd095045881044c08b3b19b697314be464fac33. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CAGOO2326368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061fa8452da4be0352bac29febc5201184824de0fc659691179229bb006ce0af. 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/CAGOO2362796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e88ae1e8f8494a3860d08c845eba8fb0be999f7e1e341f31a829b10f898892. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAHQJ2486506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833c61496e447083d04547395fc571b7e38913d51bffb03e9a790ed342a0ccd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHQJ2499080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f781f65a8c15829b37d598669a37321bcced4ba1dc8f2d1b712456f17aaeb65. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2492456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54861e5e118a07fa17e91fc1735f25fe0d61937c63cdbc817dfe86b6e04039e3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAENV2442984.
The gentle awakening of the right hemisphere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b25ba5985dbbc278ea93a2235d3c71e848c323b7cc9ce2959b37e71516f2e. 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/CAGOO2450570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c2fe289cf567892eca4645788b2c2662c0a773d52fc265b7fea33752acae4e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:23Z), 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/CAGOO2493590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8454999f0871bc67f7aef8628dfec2faa769a1ca9b5942c20f001fafedfd3462. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/CAGOO2493600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b0e1ab7d567bd4a666a292c590ba8ab7ce3dbee9bdfefac16b530e4f020da. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:24Z), 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/CALVP2446648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1768488db16af25b1319c7a52212c75a3126d88c28a3fe3d6d462b72649593b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:29:33Z), 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/CALVP2472936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faaafb22bee0c7c7311ec32fa4b9360e159411e1305797dcf138b7e97790c99. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:44:38Z), 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/CBEYJ2403940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43926826077059bd009c1b666571a36d9b2457641a22a7b27be20b6d7f6b1ad6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:51Z), 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/CBF8B2455388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb77a91b2e8a753cf877b10c66d84b455e1edcf522ec89473a7a8fcb4d32411e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CAENV2560096.