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 0x23d726b7a47b4fc1fcb51a4a06a8273c7660bca7306b5273a4b96ecfa7063061. 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/47c4ebfe-2331-4437-8200-9a5376ad2815.json and https://artists.proofprofile.net/proofs/artist/47c4ebfe-2331-4437-8200-9a5376ad2815.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 0x941e63244bac11345fdac8e86d9af0f951c10eed3697db1e96b8cb5766033b2e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMEQ2438796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f920f2c6aeb9570923c6176e3618cab8cde0ada56ba5b158d788d4e276b221. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:17Z), 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/QZNWS2494010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91057e281d032079db92489a58cd76c9e3e32bb1c7a503d8057e8ac98e9b2d77. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2494012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e69bc04ea75d155d8df3063a4da430e2e4d4b056c3f4d4e181bc4798a5f3600. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:27Z), 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/QZNWS2494014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8d7ee89860e3c4334276ea9b7d8d0524210b66679d32d21fc84a5ddddb7b54. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWS2494016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8309e589e01711e25130f169fc830b8f69f344472d4e5683ab285018402f0fa5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWS2494018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc83166a8e503674f299d5bcc8eb9153eeb7d9c77229681ad299b844eb7ba5a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWS2494019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53bd70971eebcff3534015f802b9b5e3208872cbed95fdb1879711a2067e919. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWS2494020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e342f6caadb1f0b8debd7020ce9c935d2b158f3f13dedb45ecc7dec2c47e75. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWS2494021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf0da2a37ad388ae7cc33f976f930469cda691bba077510b2ef079f89b1f99. 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/QZNWS2494023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfec7e0267fa9a4362f2721c4768039323f2141558e570d2383a2ac90696a7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWS2494024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eef9d3d0596ba4995b72433fed21ed8434974bf27aa55bf312c002b28fd4fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWY2487087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b088b8d308fea5232d8e258ba36c7943f74a516f296f73e2e33df7be301937f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP52455276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcc6a256f745f5ffbdaa074290f16f684cfa2501b077f0023902660dbdd2b58. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:55:46Z), 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/QZTBA2458832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb88009e7c4230f817a59fb17774a2a36acc909a01ef1d61ff830d6514dc1c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6H2504769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105e6490d7d5d10e88624cfea88ffadde195123718ec82acce113d2dacfbc229. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6H2504770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb39c1ea0945e38e6a42daedf188e779090c66cb6909f930d4ce45a6c978ec. 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/QZK6H2504771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e517dacb827b1abf20e7dad4428f9ad101e64f040f32bcf93ab6cb33f115994. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6H2504772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2384a3833f7ad7ebd6f4cfc16f9542879bdcfbc602f88b338639dbeb09a6fe95. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6H2504774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b4a5f6bab7e648b64f6954f9654b80c1c180f2ff07c2d900a4c58615bb97bf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFK2510825.