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 0x57763caadc6d4d6739fc739a2feb5c308a5868cb5ede2775dd5b8d81d927feee. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bab3d636-7fdf-408b-819e-aca346adeed3.json and https://artists.proofprofile.net/proofs/artist/bab3d636-7fdf-408b-819e-aca346adeed3.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 0xc81c57fcb2fa1d1ee7568f2e3996adfcd58171a7943bc58e697de7823b66056c. 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/TCABJ1224093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192fabd839d62a8333e94c823d51c4773923b93a2465e8630b985d645f7336bc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABJ1224095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec046af20da25f963328b11b7f9f593dcf786dda6ae5998842591a63fae7d0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:35:49Z), 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/TCABJ1224096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7063c766d52a9911d9ba9bbb6512bf9f2f2cd3f212a87bcf75509fc0f0fde84. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCABJ1224106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122fc707db9de150c735cd1113ebc8d78cfd87fd96b4e2043847a041ed9981bb. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:38:35Z), 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/QZHN32556094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31587a191837089fad35ccfabf7310e262839ea0969da8cac6f132e5882c6b1d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHN32556095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e40ee8de5a6e05e7b87fa701b9b2ff6302f38e42b6cb95413d809d1aef86b. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZHN32556096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa935078b958f62ad27630edc3210961b16b4c16a2c540456e4f8a4c6dfb207ef. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:29Z), 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/QZHN32556097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ffdee61440eb6b1601f41645a54d4f4886d08df336ea798ae38517e932a1c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHN32556098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73963d47c1d1ea593032e054575901cfc31dc61f95aed5e5e3e7f09bfaa32957. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:03:10Z), 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/QZHN32556099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c7740fceb546691e3c89be87bfff169565c7788a8c50622b9000a10499ff72. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:27:02Z), 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/QZHN32556100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42ce750e4aa2e181178c6f9be03617acb2e5e983d2473ab40f2de0d6ebefa4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32556101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141880d9df6583abc0f5b82f9b24d238def52ceb2797b615ba5243be1eeb90e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN32556102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd9981ec9e02e1f51cf617467fc1252a91d035da023f31bb02249724de7f2a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN32556103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d336eba8f15f9bd3247540b5f4834c99fe01c307d22cec4e5e38b93406aa1cd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCACW1785385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e5c326aa5721538b34f592c57490e6ad40156d584cbc00f72ebe9e6c7516bb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:24Z), 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/TCACW1785429.