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 0x5ae572eacaebbcdf46b2577023e0d8d52a4176aea1a2d5ae4f574fae5a04d2c8. 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/cce9c4c8-6317-4309-a479-abc8f185d1bc.json and https://artists.proofprofile.net/proofs/artist/cce9c4c8-6317-4309-a479-abc8f185d1bc.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 0xacf221b9a99a39c495167209c047883dd7925b4500d6ff58d6f188406552be52. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLG3P1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8869bdc876c2d28520a7786469f540f4d2087d890a359f7bafd861ab50fc49. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:43Z), 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/NLG3P1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70c691311e29cdb38606588bfa0d47803b972c20bbbb84192e6c8891d458673. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:02Z), 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/NLG3P1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d7f590edfe8e5b49a856420219630d3306b7d2e1adc0762b2a30600f017a8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEU671704110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8a7b778fcbd9048c77b3cf3bbd10e8afabeef1edc3d5281a1f2fee9cc343d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL8RL2414342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1dca4a40824e7364dbe1159bb26aad384a7ea708a50e955d9a7dff333629c. 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/NL8RL2414340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab847dca4bb96c94258c3ed0a13c02b32779a241761d39b10b3c6a1184e029. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL8RL2414341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d20547101c514fb745a7c07ff4c6072acd88829d1432ca9a90b076b1ff8fbd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2516494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84864fa45e613fe875566113be24c2479fe63f0d31019ad5e46161a3b0cd2d93. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CBEFB2500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741e90148ee43490d3ee7f19ceebe76e7abef13e5f174f612c7651038c1a4c4e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:46:58Z), 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/CBEFB2500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248deedc6792cf695e7d2106941345319e7b0eac6b6062517d5494a71c3125cb. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CBEFB2500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff6e4162cdc59af4c7bd14ea7fe8738c1045923000a2bec850763dc4ad601a. 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/GXEUJ2400097.