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 0x713caf0332f70972b5a06d1f7a65cda2d3e2d9b37f5e00e3694cac50fb057a6d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d33b90a1-03dd-4fdd-9900-478fd1fd1138.json and https://artists.proofprofile.net/proofs/artist/d33b90a1-03dd-4fdd-9900-478fd1fd1138.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 0x4b2e44f9e7e0348092c2c0a6dadf805949f9743d8f431cf4a6d20587e95992ea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92432328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273ca98085fbaf2f3269e52e99a0468ded0c591595f6a4a73b061fe759a1ae53. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92432329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebfebf0f601808e697c18b9132cbc9731075a3cbf3d6307008022e90c18d4ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92432330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c9fada87cec0dab51cf04bfd6baf1efa82f811e563a740a03cea1e444275e8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92432331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd2f0f5dee8984dbb9ecaea9da355cbf510ff7819fe74bae162ae9cd0353e3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92432332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0689a1ad94f3ee5a0af011f6416a325046cf37aae85b43f8e2920b57cde51532. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GX3Q92432333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1509b19d5f0349974ff29b79a44f68ac10b10f3370e1e25d0ec307198830a9ba. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX3Q92432334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ced11f5dca3c4434b993798d32c6b5067700f7e0af9e7ac23d0090c7b430a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92432335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde57a5684acdc31c3141fff00b6d653a6dd7cfff83be646654943b5e558c37d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX3Q92432336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363eae3c0eac9e970f64478a7a8af892f1be0ed67fca397af3c586bd87b8992b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GX3Q92432337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2b1bd2ceb12ea7a4ea9eaf8a03d5c899eb0bbd86c2266b66a1645b179ba53. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92432338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2552d2880746d05c1e7c65dae10fc9b545849695ce9494099c6010db4dd239. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX3Q92432339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b5b9dda4f34be7d3d6513caac7bf24b0b1108cec70d38e78031424c65f489. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92432340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27487fd06508cebe95a19973870d5f045aef3dd091dda08a2c3feeb12658b6ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92432341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf39e60177e43700581411811332bbd3c92a575dc7f0c21d4cf7b367343e0d54. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBMA22412563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89acb10ce43a667515e95914e39ed00052f1d9986814cac46f07e0f633f0a31. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBMA22412564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93fc8813a2c5afcaa80390de103eb021518da8b823a2e7884d550f057f35051. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22412565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4db235427797bc0b95de11c3cef7d05a31fd3485042f4fda8fcb6eb971e0c0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22412568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d8e57210e4188c15a2f519fadbd3f80349d162511d6c26191f11691417d08. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22412569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae7699833ffca62860367c43957d811d0ee115c1df804984e27f9bef03347d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBMA22412571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900bfdd08faacb56e21763bb61e77d39aa5763487d1706b8fba4880ab60e5157. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22412572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514be72b519f672bb5a21dc22cee610755c5986ba24d03a4dad4af753ca3e939. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22412573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9084d184299b50e2527a543c4006a7874c86ada107c96ee502b17e76568a6a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBMA22412574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970ccf6b63d2f4876766450e6b7fb49b9eaa2ebb29545924c19311974b42d3e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22412575.