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 0x75aa411d241c6241fd59b20e6b1c81517709896d4c7ef4a79e60c7d906a6d920. 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/a6cef40c-23ab-426b-8716-ba36c77f537f.json and https://artists.proofprofile.net/proofs/artist/a6cef40c-23ab-426b-8716-ba36c77f537f.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 0x6a2d43c97b4c851555a1c6fc67811e77aeedf359bf28a4b36abb6c7e9308fb13. 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/FRX202466236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b62e6fdc162031b65c513421a38781d8fb37dfff1c5a8f501ce4668f3ac2632. 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/FR59R2478975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd610b072c832cce39c7edcbee19440f2a574a20a51dddde934eb5e2d32b79617. 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/DGA0Q2342457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796a52a734f41616a1c50b55efe3c4e304b1e7dde609714e1f6379a42d3c54a0. 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/FRX202372944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d6050fd2c226f81680c82604f1b2ee9e1200db81007ae38942cb2a20e834e. 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/FR2X42392896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30d275836dc3873e466b3d0cb9aea603d664876c8442d7fe728515172cd55e6. 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/HKG732203578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132acc7574e3bf416f26d9d9e861c33e12760d5c270725a1a2e16157d732f524. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG731766428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a0f3c5d5579336115b0fe9465d2ee35130a7cf7816244c33d59a697ace115. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731751308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb0600e23f5430489aa5511209e2a22e8511557d6579d6c9ea5c73b109aecc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:56:15Z), 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/HKG732148656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c723e3dad2fe10f791e1a48dbf2083d4efc5f75860ca0ad24f2918175ffa35b. 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/HKG732147641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd4ef9058f2e57900f622daf159b47aae0dc660e2457eed1c1e0b880276a767. 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/HKG732136554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd628f88b27d57298acc1d08ac2d5c5b1f94e8ceda40c269dd0344e456226708. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732142835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef672b199a3aa51385e4a84a58d8e8e228d2917d8c3cb016d9dbd498ff61c7f. 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/HKG732116988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5f4cbd942347778201e050c463143bbf9501f87dabb8ebbd19e8980e8de29. 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/HKG732023390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfa6a3619654e9eaf5f39bd3f2c3c753ced3f69507bbe64a6c41b3aac6f20cf. 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/HKG732022734.