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 0xf77dab07678f804aafc01bd29f9d2ba36b7d3d644d59933c32191917450f206d. 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/2148301c-f44a-42dc-9f0d-d21baf1d2f29.json and https://artists.proofprofile.net/proofs/artist/2148301c-f44a-42dc-9f0d-d21baf1d2f29.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 0x1783af7129e54cbe924c9131af3a36b9d7cdf83e122d3e536f44c0b9a97864fc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGE2200417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf094db3eb108ff2d6f48bd7e17f6116476480a99de394674af12da286397d175. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGH2269580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0270423f3654c402ceab93e693e56386728fc326a1ff527c05448a5d44d1154. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAHL2395673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fb307c9d2c07e0cc185909d4326ade7f710fe8fdd06bf6c29969dfb8cd2670. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:10:38Z), 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/TCAHN2394313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c1e6fe05605bad723cbca6376b42dbd2f008b74000255eef2378392ef05300. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8A2424034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54acb93d179b7fad53e930e28f3374d3106786e5e613df4c093b610358c35238. 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/QZZ8A2424167.
It's Summer, I Love You, and I'm Surrounded by Snow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0270423f3654c402ceab93e693e56386728fc326a1ff527c05448a5d44d1154. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHL2395673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde75e27da543406380990981656bb5601f1e2d6602b0d64731dbe52a4b96f72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8A2424060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57a74212b690452b82132fec3a304060e6e99f5a53b0ea05dd0830345a0b895. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:46Z), 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/QZZ8A2424063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb214dc9d99c0e1d782b17741a4d30477a1c56e919a4ca82bacb457bf46e22ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8A2424166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93852adf0b26be4f466e6748f5942cabc3fa2290be21770668c2fed9bf75a9f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8A2424173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46bfa13118066efc7225c915e726a8368654ba7abdb003e41da0eb0467eb327. 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/TCAHN2394319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64305fba366aab3a9a89742763b7a8ca3ffb11d1942f305df6d5dc7cded63247. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8A2424179.