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 0xb491ca1053b9527acf1709152d1a8300976bf0e679698e58562e4f9239a5cea2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59c13cb6-0851-4c2b-93b0-dfe4a3c6f5a2.json and https://artists.proofprofile.net/proofs/artist/59c13cb6-0851-4c2b-93b0-dfe4a3c6f5a2.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 0x5ff00f0013de00433067d2d487ab90e14f5bacc720e5ebf68217396f558537db. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWS2122999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf8aad7c771263471ba4c583171dc89ae41ff059671a57742ca9034e970cf04. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTAT2121556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459799facf44073f9b606ab22cb105d44723c6ee6322e0bb213103404a3329fc. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFZ62264238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0134272a660fa8228c93c5879b8375c1ce80a6f2d91a1e107bdb15728ccec3a5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN52235809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03d71b1c487c3b6b3141e18799f8b436f8541872071db4ca4f5c5a227fd650. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFZ22312077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6a8e1ca1f23c5013189364f1273e2b473f28a253d92ceb95ea4322a84b8e9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6M2377634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17213b4e567bcd936173bd356dbcbbb7d8074e331bfb73a311ce4abc7fb941. 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/QZK6Q2451528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6a8e1ca1f23c5013189364f1273e2b473f28a253d92ceb95ea4322a84b8e9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:33:42Z), 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/QZK6M2377634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5bd3e401d7cc976cdc910d25c59e88c4032beda552ca1c3d9f38bcf6d4a9e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G2422759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe624fe075acfc96e369279cdcd2b445d86750b3bfa2a4a43a299fe2543e916. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G2428086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dca3dff687222d15ff3030d5fe0dc479e218f1455e0196a5a377534c524013f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZTB92317503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1d8b518b19f704351ce724d9d8df865e5ec4d424c0ccb595b75be0696bbd67. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6N22594984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6134adc7c46b9fee1801150e47adab32fb41ff9be71b84a8ec6938f38bfb1bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMBZ92548698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e1fb6be1caa80f4e125f0d9e0de25bd131ef219c0d895d6885f08322f0579b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:44:43Z), 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/QMDA62565481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3a5f96f07397b7adf065d18fb60a1b1ebf028fee8158d893afc9ab03e95f2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMFME2544065.