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 0x19b704953cd553223e4182f9c110fd1b22b4813592b3c78f476250231cb8c170. 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/ed359922-d639-49ee-9968-3c9bd2794fa1.json and https://artists.proofprofile.net/proofs/artist/ed359922-d639-49ee-9968-3c9bd2794fa1.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 0x28a89048ca019b359cfec7abc98129caa69a2f6f8419c0af36a9c6708a82b109. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:57:18Z), 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/QZWFM2452406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b51b8d4f2bbac6bf40a6c780e8573156be249f0e17d48e3d4d535f3fa5e73. 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/QZWFN2455936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2186f1d67b5dd98dca298238dbcedbf354dfde1cc8b4546f2f8e2822bc6d7119. 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/QZWFN2455950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b35bb4ee7161f1af88944159a2021eecfcd28b63af097ef5e583853ed96a1. 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/QZWFQ2443984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150101cf9c8e5729878422f9a054a3c8aa75e0861a2ab1c889f26f37dc611c24. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:55:53Z), 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/QZWFQ2443990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e0ba3edebab9fe5dd1a422030cf92166b5956e84607940a075742c4515986f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:17:56Z), 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/QZWFQ2443993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51469f00bd49c509b4e550c85c285514db5e8856537e61e32f1c7d732b2be42. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFU2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0a973fb9e5a31c7e4cb3edba0e0c12e7666359d9c816e13afe8ee409d22a19. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFU2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e244981f714b7a7001f3ffddd67ed873c05c913035ee7d702a3e36ad98852. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZWFU2400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9d97f45c69c7d1fe0c84166d9eb552995bdb876c07fe00fc6a5880e2e1be56. 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/QZWFU2400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0756f8d29076d0cd2a4e500637294a9609a8b3e5a63952941cdccb7edb5863d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFU2400626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3cbd9cb28e9d9b88be34ddb1dc498a6f229a60bee4e6030c188a9f6623f6b. 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/QZWFU2400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30acc4cff40352aef8184ce7af11532bf7d0c0fd7c96761a6a4f59fc82583cb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:44Z), 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/QZWFU2400629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3509f88bb530e3bd47459a5173b7926394d77b8562d4924a4313957b9356b44. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:06:18Z), 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/QZWFU2400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed0631530ab5c43e39d3082cd16693a6a7b4eff997907a5e619c81bf9a8ded. 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/QZWFU2400632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac34e1e6e06d9ec429e9bd45d97ea7389eb7c9cbcca30f9c8a242ab8b3a8ca. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:50:31Z), 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/QZWFU2400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde166c2b2305fa65a8db3bb65e8197c154f93bcc867b4db0592dc8290320ce78. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFU2400638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73336fc6cb010675951d1a6abbbeef3b8f54d4281c482e9d5d30d0de58456040. 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/QZWFU2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83890048fe37602e36f25019aea4688c68fb09aa7420f4285dad44937c965c01. 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/QT3EY2487111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e30992689d89ab2765dc7f7dc7d8634480c67c4edb85b1c661940e2df210e4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3EY2487114.