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 0x45fc288a8c6b1d0d171b315a7bf5fe54fa92460d67742444e5245b79b0573b5a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/442a8ff8-89e4-4f31-9c71-f0f8dfcd32ef.json and https://artists.proofprofile.net/proofs/artist/442a8ff8-89e4-4f31-9c71-f0f8dfcd32ef.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 0x4ba7811666f08c1f38b6642fa0ec7d52801ad772817900bf7699a01e9bb7f742. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:30Z), 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/QZZ7U2489318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5bfbb258fa3a5fbe217f2ccc92d952ce61abc5867f911230ade48623be40e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7U2489319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e09c2d541aa1a0bbf25a66b8b1b083a8a35af82fb0fd869876344954594e30. 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/QZZ7U2489320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b1653b404b580cdd7b67c6bd07f00502c4b0f598c06bc29ea9513f53e47568. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2489321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb2d51ebf48e1bf7c2bfa01ca065ea19e6097c6ae154feb696d8bf6b23caf5b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:55Z), 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/QZZ7U2489322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58d7e2e74ea0da2a0edbd622ac9deb0d6b3eec0aa258dc04a6618a6b72c9b8c. 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/QZZ7U2489323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e6e122b334a97e25846911d4c290eb086022f268cc6453d56174cdecb489ab. 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/QZTB92469724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea1e218e7dffe1dd7c1ee8d649a4a3f1ff7554dc8147df41562f953e26baf7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7U2489324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa013ed938f12acfeafc7c8eceff21e235ab76bf6c89906dc11777595f99b3f3d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZZ7U2489325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d0e9d4f682b7e19ea978760bb0d895102214aa45c4e4bb6a463bb0119b41f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:46Z), 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/QZZ7U2489326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db19d5b0499decdcacfc27aabbbd4b772ebf8b6f81c74d2570f0658d0a2f8f0. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZZ7U2489327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb1afb27ccfad220071ea8d251763c652b5e0da9e8f08e7af6fa9317c14da1a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ7U2489329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed79847b8a31131af1cf0572b3e6fbe4acf072ee6220207e0aeb1131c20f360d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2505912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a2952227e2191447952de6f68efa8fd55cef11d4374e71c5b0712599ab6bd. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFH2575896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e077f1b33a106cdfa01835513c6740a0b3a5e731f00abdfee3772e3d0bb572. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7S2575879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fc7f6f861e741815b4c7bae351c3b731c38a1bf18e5fd1adf162d9a3f9942. 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/QZZ7S2575883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70cb25d128684f1c63a7a1ff3696a615f177e61313d859052de11820326e1f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7S2575886.