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 0x009e5309850598b78a9d27497df2dd6917b690922614ecc46ca84a1437050b5c. 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/92712594-a20e-43ff-87a8-e058c43fc58e.json and https://artists.proofprofile.net/proofs/artist/92712594-a20e-43ff-87a8-e058c43fc58e.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 0xadc1d0cca1d97fd57224b6ee81262c15d7ff40384512b012d8be4a4590496195. 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/DEB331758801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea95090036971c98e630194123ec7682a3d321775b342dc5daa7e2dbdfb1fcb8. 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/DEB331758802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe072d8df5118a0ae306e7bff6e1bf7b69976da4723c1258d6ccf6a659916dd39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331758803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1720bdc72f497d4039d358ca8b8a3c599109f1da73957a1b2b7c8ab11fd6f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331758804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1928e5965e753715688613ce3328a446f95da91edd05e75b8c5aad98d01d4825. 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/DEB331758806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6047723d277661f2123953eef2977c1580f0186ff1bf5dfc7663e432b389e4e1. 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/DEB331758807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a7ab424503e28d5d921d2763c33593ab822589e544e3d85942fd31bcc0dff. 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/DEB331758810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0cb40a7d7cc9c32cf5b9b5362dfd30c53899dbda263e7ccf945d04713ebbd6. 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/DEB331758811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d38275ad4a9128cc8976a227a989680cbe1bbeb54782212b91ab629cf9fa73. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEB331758805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d0332f5620cd18dabb0883f5afe874ebce99dbe2fb8aa90fb30e504586907. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEB331758808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c8e275c6847717230ef53c7f5d7fd7a009ce3dabc28b51853db99019bb98c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEB331758809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47e27e1e8e2ea9e001be244ec5299578e353e3cf0b57754fb04dbdb0efc120d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB331758812.
MPBC - Nelson Ayres (Música Popular Brasileira Contemporânea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7733fd3a88bf1d2e0caa4c13c02e15db4a5bb8b900e3452006b6b99851222. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRLXL1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97490ea5d0eb158d8d5b032d984721f25ceb951e819e70be802dd5494a6c444f. 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/BRLXL1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca554e38295aada54bd82aab963d91489d290edd365d8f1b23c502ca36018171. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRLXL1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d8eaf60a4e8396ad5c3e6b4b16b35963c59c5ddbab1430b6e5fc2e0bc3064. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/BRLXL1800002.