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 0xf0ea3e3c47608afe2b82ca84b78a26889883dcafa8bd68d433cd40a3d3fa1282. 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/a7c03855-4891-45b8-8c07-31bdac8b3501.json and https://artists.proofprofile.net/proofs/artist/a7c03855-4891-45b8-8c07-31bdac8b3501.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 0xcf7b3ca26d462637a34fb39db60b881b0940faf94861c77e0f9a50f32085574e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ARF410090805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf96eb4fd3be1ef4ac9885d96eb40475e622abf8a0060498811d609342e1f0. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:04Z), 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/ARF410090806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad78b122cb0ddc375c66d84b9b6cef6574267afe83cedb34ce006dcf79a0d92. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ARF410090811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf134854c781e9f41b21be394f0e39c788305d43d6de130caccda2e6ae00dfb8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARF410090813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ac8d430d00d4a1f6bb732413f436229b977da9c0489317bd9c9f7f5a2aed36. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ARF410090814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a2c3880c2b6ebe812fbf2766f789a8b92c87a82ac05eda11aa673410163f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF412100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b67f09e953690b3790f8eae44d61f2a67852ec100b665b1007b8d13f1bdba4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF411900347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79408f78a713acce15e5733dba91fc49462272863f8d645011c2d63cc88ee817. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF410090807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee2939fcaf3c6986a527f0ceae43a7456a17d1434113b1622829d5f99982883. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412000032.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a2c3880c2b6ebe812fbf2766f789a8b92c87a82ac05eda11aa673410163f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF412100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d246da578a98841d49a36dcac3095f9f9f4c15c9d088e3b422980cd59f7d338. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARF412300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b738fb4d4770881750aa1a0a299680e881763afd932d7f141782bcd6deb00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF411001021.
Rainy Day Vol. 1 - Jazz and Lounge Selection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b738fb4d4770881750aa1a0a299680e881763afd932d7f141782bcd6deb00. 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/ARF411001021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b738fb4d4770881750aa1a0a299680e881763afd932d7f141782bcd6deb00. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARF411001021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b3ca26d462637a34fb39db60b881b0940faf94861c77e0f9a50f32085574e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF410090805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a2c3880c2b6ebe812fbf2766f789a8b92c87a82ac05eda11aa673410163f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF412100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee2939fcaf3c6986a527f0ceae43a7456a17d1434113b1622829d5f99982883. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF412000032.
A Face In The Crowd - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee2939fcaf3c6986a527f0ceae43a7456a17d1434113b1622829d5f99982883. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF412000032.