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 0xe431103614743dc6804cb46bd896a44a8367dc3af01a8f3d25664bc8c69300f8. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7491231-36d0-40c1-8ab7-c704b0786861.json and https://artists.proofprofile.net/proofs/artist/d7491231-36d0-40c1-8ab7-c704b0786861.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 0xcc4eede5ebe957ddd8739901c40c70e2f77b9e77f855cbfa07ae9bc79be673a3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/AEA3A2529032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3450320c85defa72a59a92fb9f0c3e9bd852ad95703979343df7f34170f1e9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:29Z), 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/FRX282523594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2609e6decac6d04b9785d4ce753aacf34f9e568bf3c4daa23a24193162cbf4e4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRX282523595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed238c46107468412e80cdc447f79171b08f6276daafc6ae2d92d6f663e9b81. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX282523596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb6d0b121a726abd8b099291609dd347aaed3dee0996cb11b21d960891c799c. 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/FRX282523597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc3859e7514f0c3ab3413b0880c201f2e8602cb07979d34a71c8c490a8130b4. 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/AEA3A2568982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47575e23a8922c8e880c9a25c29993ff909f7f7428841579a4df8d76ee8e30af. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX282537343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c79d015d48106bc889a4ad3206682db19d0d56c79ec5ab310dc41bb115a62. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:16:43Z), 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/FRX282537344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad31fbe3a04a53ab070ac41626de628207ab2c42407fe12713cd2b02030d4e20. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXBAV2062079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19eb6d446a8a42317bc88b701c091e68be201d8a5f9912a2a66b4e70a9b6e41. 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/GXBAV2001875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f7fda0aacadebfd35d419fd199845ba529f38624b6130e99a951f24987048. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXBAV2086297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fb9a4cebd843674e8e406e74123ef49c664ea2a9d5d34d805380254474635b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:49:00Z), 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/GXBAV2010506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe11ecc54be228428018747a930a69471e6a18ae461176859a4207cfc985ba4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:06Z), 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/FRX762582810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d86823d819a07f7b290be15aaa73efd2798dea049518bff31e2cc65c76f8ab2. 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/FRX762582811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0da45d3fe604d9305f5adac78623e6ca43de4e7495b699dc2bf470c8f1bfd4. 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/FRX762582812.