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 0xd9f44b6860a9ff11bf0ade2859f595795b968f6052c29851a252616729d9f1fd. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af31f5be-d9dc-4d5f-98fe-70f793c3774e.json and https://artists.proofprofile.net/proofs/artist/af31f5be-d9dc-4d5f-98fe-70f793c3774e.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 0x436eb5e1f7a597ffcdcc831369bcbe1a6182653387e68650bd42ce9f3715905b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA72455816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc586ed5e22219dfb0651f7f36b280f9eb2b9cb81f2d082a3f5cb652d2b15a4f4. 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/QZWFJ2404038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34928b8f718bb6c1f1ea241500869b5605679db633cae7d86d95be24620a938. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:23Z), 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/QZRP52487269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd770d426996d6600d69c4708965d988fc7158500119260871f8711cbd4329fd4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62593068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096cac3395fb4842083de857b607ae943f36dfe90b355ee6535d3c7487d62812. 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/QZHNA2573358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ef5ad5722f3036f0fa13642a9f5ca823f0f5a75a35f5e10b3e89ea3033a80. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNA2573361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfcf2a4d490ef7a5a0392be345cd2cecbf33acfbf5371b37fb23f216df3d559. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHNA2573363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791c61dae75cc7ee8b1635a2ce88dfe063847909ba899785d81e1bd1fda01da4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2583253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d4a5928e09012b9e91311c293a343cf9d270c72791213febdeb938ba84ed08. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:45Z), 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/QZK6J2566204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbd43e4696a5a53fba36bf1605e12e5a57c9544e4486330e2ec301a2658214f. 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/QZNWS2567191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6c6547b9655b1b5cfd7bb6b21e74eb793fb1911287f291568f0a6fe6dc718. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2547952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c15ebc05664bd04110716628066fc7814a2fb7e44850bae056ff508aa04d992. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:27Z), 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/QZTAY2557190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe009b7c2e6656f8dfcf540868b80afe6420272bb7aaa372c04567abdedd32e40. 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/QZTAY2557192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac490305f8bc2adfcb21a2645ef3aba7788afd8ab47ccbdfc02974aaf16109dd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:34Z), 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/QZTAY2557193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132fe250cf63823ba701e4179cb5467a55fb6fe7fb26d6b79963c05a4aecb7b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAY2557195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3b4c3d9ab3963b641d95a6d1bdb49175d0d1d07d52a455a3407fa76cdb723a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2557196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac44fa6fd214c2182616eb6331d3a7132916890f6d7c8780e56bebc5609fdd9. 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/QZTAY2557197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc476706e95bda6be5528bf94fab03cecb3b81eed41687643eeb73152c29a6b6. 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/QZTAY2557198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9512a9b19646896d401b09bb2a9c7f846d7f2bb6ea79ec097460ed28cabe2f2a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAY2557200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27ae6f465b12595333d8112853e9e3bda843caf0c240e8026e41abadc10250. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:47Z), 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/QZTAY2557201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f797abb2a818996915e3e3a9c6333bace5b8432576b31d4e1eb9773ddcd1931. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2557202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61768dd4c7686d986e8596a0d80ee7adbfcf7677aa5c188eb342bb688c11706. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAY2557203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0d1cd7a06aa0c13820c2403acf1ff7959dff24f6e423dc5f598cff4d1e5e5e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFP2589885.