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 0xd776fcf3eff45ad9d33ce9c98fbe1e606572eda359dc7e78e11aea643e5492c5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57a36932-7e1f-4e44-9575-670a11de9e0a.json and https://artists.proofprofile.net/proofs/artist/57a36932-7e1f-4e44-9575-670a11de9e0a.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 0x6453c1ec6cc61c181cd5f0ec12c7336f6ce5af51efb290720fb2ffe23f4446fd. 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/BCSOR2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313dab2e755afcc39983fc64988ef58501b146554d989d9e7f372e94257836a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSOR2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe117eb6dcca2d4a23f79c13025bac71c52f1130dcdaba54184ac8d20b3fb432. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCSOR2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5385385a561d9f7e50f4ebb103fa7536cf18bc16bc522f705a4a9439a944bd9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSOR2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c3f13fb1f5fd52638d81c9e8150252d78fd1fbba3210b155139a879071ad32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSOR2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167883097f57bcce9e9d748f9083924ec692a1b44fe17e144e7fe33497f4d34. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BCSOR2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b40828343f56a64f3724d2ab9f6e4e39b551ff584d4fbe1082d93f887e63cd5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCSOR2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e825eb8e231ed266c6ce3d06da1f963db67c7a2f0985e4b0535488c197d929a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2017972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a86f76fc878271d98d971dd51ac112480e5d7a69a8428a80972095dbfb1cec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ62088073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad266ba632b1b7b8855aa13d6fe7a0a0245520fe24048c8461bae6ce7555c1a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSOR2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb866a61fb32fdc325bd39a0510d37b4cb012df7c1c86182f60e6dde8a411e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCSOR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855e51f94df809831dbe7d4f75d7e473bb33bf0125974def9ade860e1d7b5f0d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCSOR2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f74cab08b39ef40ed89aa80020a803b2b94bc467eee80cf776f09c60c55f5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88c098d426b5f1583ce3f69d039283a7cfec4967df0c41e4853d93332c9a787. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473c50bcb2d6f4dbe3367b8c3e957b400d85a757f4d04fff06c9589bddb25341. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed70380202b708e66acbb929345bad64e657089861dfc2009e54e5348750fca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8795a786fc5cccbc001a49109e8726e4050341aed5e0ff7479dde773643271c3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d35f40cff3594ab15a875e08207edfc9e1244ea8493c6878c9964bf95de9950. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b022609d9152eb142a351eb2c89de28ceeafb1551ca1377f99f2afcf5d0306. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCSOR2200091.