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 0xe1a71598460b0dc9f580439b563ba71f39331d65bb58a78ec62469426b8461fc. 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/e2039c09-0a0b-419b-8d2c-219a6873bc59.json and https://artists.proofprofile.net/proofs/artist/e2039c09-0a0b-419b-8d2c-219a6873bc59.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 0x232f1304c6a31469557bc8193efdd5d53c34cbe67e68c143c584eadc381dd7c1. 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/INU192001056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5212602788a6625e62f537e5a783819b2c9c3c8a42322d944d777b9271fa7bce. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:39:33Z), 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/INU192001145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac4d60ac40248c14b27c8f4a82b45f26ae3e067ec70f26a4e8a7dd4a782282. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INU192001147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de05296cf28816dfa9259f0ac7cb2dde675e360dfcb6d56aa22f06d79fedd0b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/INU192001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc36831575db196a99d02e89cf85102679382d926b71094f4523c25260f53f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INU192001152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae25519fbfbe4b02ef0b6dd4e6018efdbc267d465cd1bcc9b1f4262feab315. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INU192001106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d4206bd0572e63278f208bfffd8919fa4f95e7401eabec0c57b4171baf9f5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:52Z), 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/INU192001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3b6ac8a154b673b0742ca1d606451b26207c966b4f07351a0eab61ba9778b2. 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/INU192001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1238465c0c247a4df0b8b1f9a4f52045b23d0d7ddfed3b0932bbf1752ee344cf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/INU192001144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc24f17e02ef72bbbf609b2bea5a338f7ed32412817a7777ce9a83f14e5a747. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:24:29Z), 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/INU192001121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31400f57d9eff9dd2533a28221e940743be1aa7bcb911b21d10cec35da58cd. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/INU192001071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e396e6ff8e2f5111b208a0a367d338a5daca63edcc8ac70e481dbd059d2667. 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/INU192001073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222713721e1e01dcd980e66ac26354e8fac419b13d7a4c8a1ba3b7d7cd955338. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:30Z), 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/INU192001186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f78c05c04e506bbab82cab53cdccd5d1478172ca22848c6abe0c5d17fb5737. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:49Z), 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/INU192001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a529ffa5d97bfbdb6a570dac81ea989d3bc7bb209e1f891affaff2896a4e73. 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/INU192001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca14430891f31b808a9f3b5f6119e0171e8d8f92deaa61020e16c89721fd974. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/INU192001183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eecbe1ed25f03d5d85d149241480ccca9b35e5de110a00f93e7e7f1e0222dc. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/INU192001279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004682b99ae2c45e06d7d127b118d8218ce90448c067c5bd6853e9b668a5fd9e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/INU192001497.