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 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 0xc30006523c4c1d451d2e3b9ef32047e0262699c622e18b54ab53900680cf8ade. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db783a8-1440-4ecf-bfc8-c689bfd774cc.json and https://artists.proofprofile.net/proofs/artist/5db783a8-1440-4ecf-bfc8-c689bfd774cc.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 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 0xffc05fb28e19c72b0c747c77e14ba1e4da1557a803d1fdb87a4945cc216c7ad7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZNJZ2343249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0790982daf76b88dd7472c89c39511e53e20f02ff60b3e8e890372e5ec3cd03a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZNJZ2343253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7931e6c00ca4e1b817da50796b0272ff536135592af826d1a5486ec37c15a39e. 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/QZK6P2199685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8814a54dccf1142a9bacae8ec62546b6c45dbe9abbccbf0fdc536d4dc4f652. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFZ32478698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3535018898e498b3cf0fea2d731904335c3f59d7caaaebd379dbb103da59d81. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWR2347300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa91854c01469a6f1d74f7c9c9e6a11c25e1bf9bf2e2aa54a07143e719839a0. 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/QM4TW2322920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f349db1f486a550a977e993f019401674e85646f823f43fcdbebf3ae90bcc6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA2P2147521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24518d822f527bc6ce86d2a8f7c6bf72b7c681dd9aa3242776193e0134bb63e9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHNB2184631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff9c9a7ddc4db1fb80ac1e622be9ca09737692507508c75588552c5d149d98. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP2216198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc025474b92daef73995d9e755235f2f709e5d544fd46193ec937f483a94ff7d3. 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/GBLFP2216199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aa732667c30943b3dd83bb0062c8c3d2aec6475bf4e92b5b2a23bf4b566ca8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLFP2216200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223cf1efe01cd72e7079490f02c5a99dd5583c8bed29ea66ef71bb70b4342aec. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBLFP2216208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ce9deba7cd01566bbe26cf65e88f6c9adac43824add945c5d42246cb7eea3. 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/GBLFP2216207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de404332fb2189b049d8bffe5591fb7dee4d524600d5b268d76601bf71dc48. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBLFP2216206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932a4379d1482175364e29941e612db380d439f42fd0005036ae0cb86bfcd500. 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/GBLFP2216202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc4f716fff1281ba5aa7bf0a13a136c73bfe8fc0ba320ac3e8c37865e59bc3a. 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/GBLFP2216201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c77ebdc74f30432b9cc37e92f41c6aa54fee2bb4540ee18da3e28da6c252ca4. 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/GBLFP2216204.