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 0x3199919a05f0dab6c4cf9c12945b2e6d60e0a79e70efec30283181d0e4ecc517. 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/d8853140-f48e-4765-a8fe-185196d72090.json and https://artists.proofprofile.net/proofs/artist/d8853140-f48e-4765-a8fe-185196d72090.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 0xc9fe559a371eba5bb5774ee6984dc7d0bdc371a6ef6ec905463f1e6d82cd9de6. 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/QZHNB1948664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3482debaa121cc3994cbd832aa8e6af189028a31af80da34f15d893b32dd8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZES82076743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3482debaa121cc3994cbd832aa8e6af189028a31af80da34f15d893b32dd8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES82076743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a6661207027ecd8295575e61daa129fc6e7e62e9b9070134f6ec75b4de2df. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN72034396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13740b8cc8beaf6d107e85a5f91cfa048c08a6ad2355abc3c97ef061a9e9bdf5. 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/QZK6L2087189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf1a6ccc99d32b7da875d9fd7e3f3a09b0d40f069186964d84f793a3609aec. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZFYZ2128391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf1a6ccc99d32b7da875d9fd7e3f3a09b0d40f069186964d84f793a3609aec. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYZ2128391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54efecaa2c63e21bc97216471250558893dc23ba8097f8fcd246ad9dae8633f8. 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/QZDA62169297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3640a81279dd156ad4610832d41a9eddb6f167d7a0973bc433dfa9b2422d58dd. 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/QZHN62105800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ceae6513c08c5b53917b85b8edfedd02797e9d91024162f990c1cb067b678a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6L2137616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a283e6d9349683e4085c8236dcc4addb7557e2b3277fdc0c9427d2adbc839e. 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/QZMEN2194835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23a73db6b73481959426fa44612b5e5d1cfdd537d946e0b9700247f4a265471. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWV2181393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0d43a095303f7308ffef8454bd77dadf10418e8c3a5db5ee9d5dd7822b1ed. 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/QZRP52152850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a62e3f92548c54b77f2fc34a2c83bfdc6dc663a5bad2a934984cf9f8c9c4b96. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZFZ32244744.
it's sad to see that i'm the one who's sinking now
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c2abb367c839c478fed1b8fb5b07148717a3346fc4877bd95c05d74020754f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZAKB2160267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f2cba91fc03d6d4fb508626317ba90cdf1bd38fc0fe7de15992a0bee6f9dd5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZAKB2169732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad7a4470f5219feb2616c7b86f0cc5496c75a32493f825c5adaaee728f757a8. 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/QZAKB2169733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0ac2eb50bc3a8e9beb202a4661295b63ecdbd3fadd3e35a469ccbf1b72441. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZAKB2201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ebb6d03e9b0adb1ef8a90d09dc380059827f27a96ab36bfd66d927662a0f1. 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/QZAKB2209648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421f4992daa62743a3a5bfbcc0ef543f57f7984c8cebccd71691e2d338a1b5ec. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZAKB2301974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2e9f46015f733602e1bd11b379020ace96c5927e619c5f4f7ff2969615ee19. 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/QZAKB2312862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403e77f0c50352cf08f5b78f07daf25ec1f11a10ead9f56d9b5a9e0984f22adf. 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/QZAKB2316291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa923c012a124e97b5e995d560bd7af50c3d22a31599b820024673e4b06e8545d. 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/QZAKB2322242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126b13390cd88a452d04bdfa7f86799c28a289e1c7815a76de02a058c2ba1c4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZWDD2324401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ba3bcf258307c642005d4296e1030ec326228fc69ff6954ffcad9d231e9398. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ8B2311785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95e488f970e5fc8af05b409b48326a44488fc696bfa574ceecb583e2b4522d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USLZJ2483249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2bfe4a467bd1588510abf85c3ad25f156d092c7987d4602b260ab46f9f8878. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZPEW2560481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2bfe4a467bd1588510abf85c3ad25f156d092c7987d4602b260ab46f9f8878. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPEW2560481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5808560fd0b94e4843bcdc3fd4f02e74cad14e62662ba3b26764ae46dc52d7c. 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/QT2VB2502034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1a2c8c07fe5c4343b17263652ddc3eee40e56ecdfe4df96eb9e2ccdaf101c. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QT4K32508579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52535b741df3250611b5c50d467a0c4bc2ce56885db9a52a5cce8d964ba51304. 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/QT4K52575756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1b4765e2198aae87498b31244ef9626d70ac838479a72f1f03d06e11f4221. 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/QT4K42516255.