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 0xdda0a7ccb695c2db0176c44a847497641a642dbd37b9c66173923c83a17e06a1. 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/0610c675-55cf-458f-acc5-8cec1b61af9d.json and https://artists.proofprofile.net/proofs/artist/0610c675-55cf-458f-acc5-8cec1b61af9d.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 0xa544226cb45f2f30a4abe9bda7451b988b10043e5686efa90e6f7da3ec1c3fdd. 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/QM7281547386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a7df364b66c5ebc63e9b5ee4e6a69800a3d179b83dfb39749feaf00232b2a. 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/QM7281547388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190ffd3d992cefb97c1f05a523e1b766eec5da9327725edd0c78204b253aac39. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM7281547387.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ca65a2d54e783b7866d039c8f36dfc94512dab131ff81fe6ab0ce6e370ac02. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM7281547391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8eba6f054b87cf8e7ef3e9dc23e1387e70a418800279d3ea2daa509589861. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM7281547397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca79225d31393375a15e6e5ab3a0d215b586e28617391d0b3a8f60c30772b31. 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/QM6N22088170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c10849220acd52344b631dc4f3791df181faabd0ebca0d31b7eacdc5f7a6d6. 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/QM6N22088176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2aa18def0116beafee9ed15a42a2d37519bcd55d0dc78fd90e706d3ffa26a7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N22088166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571120138afd364b4506527664c63c1c44061eb0389552c10d471a1d1517381c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6N22088167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482e51ca73d37c33a8d08d96a77c44a4de6d9fab6c84c54280fcb8a7fb6bd8a8. 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/QM6MZ2502963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bb488e42e0f2eaf7799bdea3891d29b48e3fe5eac7f1843877167e3b00ff4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QM6MZ2502964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd39b930eff5b5a81baac56946d400b5bfd6e4adab243ec5ba7a6bc2712658c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6MZ2502965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff596b40a0934890da512957a3c2be0f5c67a52fda31a52892d44362ba565f6. 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/QM4TX2264745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba4e009e7f17e88707fea2ef6424a29078af6fc8894653eccde4b4120bc83d0. 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/QMBZ91912124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccdd52ff66e8ff2b8e6711fa7e2da79c6982d8222aa9aaaef47ea0142f1b61e. 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/QMDA71594021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cd1086a12ae6885abb0e9b3dfba3c0e7e0b1c61c4844e011fec5d2de0a6fd3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QMDA61311113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70c528852e323b02aea1fa63a322801e3643bcac7fda48fee5b44ea7f3c4d61. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMBZ91912123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968af09b8b00343cdc121c76982b6007f38f109466d53a14e498c1567aed5e7a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMBZ91912125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f63fe9157dcbb419734c1e9c34ec698031152dff5271b7bf0a58fc28000819. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMDA71594022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadfd22cb49991f2e199e8c3121acc9eb4ccaa2a6827b8688e1a87c140d79299. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMDA71594023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c9da56e435a18204979b16ee370f21bc5e284ccb84b64e28c4c9d477d5490. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMDA71594024.