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 0x8c0da1b8fe46d0c62558d9700e4965d36caea6c94ad801713dd05d7b87e9219b. 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/9ca3a1ca-4eb0-45b7-85f3-68dff15b48fa.json and https://artists.proofprofile.net/proofs/artist/9ca3a1ca-4eb0-45b7-85f3-68dff15b48fa.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 0x03514770fcf3eda6c0e9eb4bc406bac21494cc11e3783a5901e2413614e4a881. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81287195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5196663dd5c3ac89c5f536b600dce8304e06423646443d3f6d9f970c755695e2. 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/USHM81287198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d787ca6c4d45278e923bb2ae2476dfafc708f035cb18d5adc2ae7f5056cb419. 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/USHM21024682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9898bb12a3931dea8593790e1dbcf2a25fd6d1fbbdb0e9fae663bfeb4ec46bd2. 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/USHM21024683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382482d029f856cf7eddc2db2be84c16ad8ff475aae1fa2d5505e0e93acd2d18. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM21024685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36983cb88570f8b769f32104d4ab1d5e4e3b4f147313708a690d111b2fee6d11. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ1225780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc515163650ce8221ca8861cc3d996d5d305db5fee83e8d7ff1a0ee397a83f60. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1225781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700918dbdd090a857d8a339e98f90efcde4ebbe6a6abbc228c07414eb40f0b75. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ1225785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69244cd8582e9c43533dd081c626bfc6056ae2bf47e1db9ee68d00942f5151e7. 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/USCGJ1418086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc59d4fcedc33d877e84d74e5941a2ec3a981d3793ab68713173a4a351bf05. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USCGJ1418087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7cfc573efb9e08ed30fb9caccc531f1d61befbe576c2d735dd48d5f256a2b. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:50:42Z), 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/USL4Q1839340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbfb544dd7b5cea197a26ccad3794d9a0ac1b2f14983747d9e08ba82e36df9f. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USDY41981143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a7da13e2f0999e4552267b00b8eb461b4c60cf56e633d4fcbeddcc446327b9. 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/USHM92022099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627903fb0a2c6ee99443aaf51e3d1b994201fe530fe4fa7e2cab83d95bd91d6f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USHM92105370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b1c36c2e9994aeef872b2a807d931d16920457c3b65d49f5fe70c82711a24. 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/USHM82471993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1212fcef1f176efb7fae06744e15981840932d9ee6824078cb5f2163cf09e6. 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/US6R21479864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500551f6171eaeee292985aad9ef0877e415a3be932f385820513eccac1d9ec. 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/QM4TW1591026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7247d58372b54fb8f58fc8ec5d02263804db43231472cc79a390ac257b39d65d. 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/ESA011968793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bb8047f7a336e7236ae3b77cfd2dc76a186d1fc0fa1a223b7de979c87cc64b. 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/QMDA61320483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab63f99657b02a111792414b48e01e6dee7123f8e45f480ad0b8932a72222fd. 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/QMDA61320419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239bbf09450b0255b7748321f737e0199714a67b4917b07e95fb819924f88431. 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/USA371024335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7d35c4b85d48df5b41ea8dfdd2227d753e705580c66124132ff8aca284c9ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR6V81312742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a1481a3d361fb1595f12485b842a73e79d1f675d1f38958b2161f14112208. 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/PTVI11000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa998bacc526abc7cf069c3f0be92a49b2a8c7c17beded990c588ee4f73e07b1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA371428654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced67bf3fa33a4c08e30d7a597e653737b0640210783d68361cb30f0ff2dba87. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA371108325.
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 0x7b1398c753262edb7d2767f16438a48d6b11fa05a101c90daecec7777d7d700d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA371026026.