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 0xf20fb381efa395cc84e8c734b49a71dd39edfa42b15dc1ebe85ffe86bec2e1e4. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed1122b-7a53-4d81-ac7b-6a0c37517169.json and https://artists.proofprofile.net/proofs/artist/3ed1122b-7a53-4d81-ac7b-6a0c37517169.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 0xc36afa547ad3e3c9ae8c628d226cdab5097f7992ce02a9d6469608a037a45d29. 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/US7VG1989127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4df1f37f209c5957e6fb0e9918e2059b106e17f8d02cc5927b1e796d5ac4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2459bcfe634e4ae05f5b1acde80bd16636dbfbf1d216aca1405a802aa1d73f8. 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/QZHZ62180288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4451894da38438149f56e519713e672a81517e66af506e64c633870078215. 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/QZNJW2341154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc0468388c1b8068842aeb5b12a66ba6101f5600b060aeff5f0c8015e8b4b2b. 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/QZMZ92262346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4df1f37f209c5957e6fb0e9918e2059b106e17f8d02cc5927b1e796d5ac4c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZW9M2249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a9504d2b268dee7b1f953732f40f80c3abdd76cbf4156c9ee6a37d0874891. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZ5AB2482043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367e4231bf92cff0792cf017584234f56a166a7a23a3a706ed63bf71a252eb8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2468952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aad6e99d61de72dc05d033d73592b5468d28c0339fb6355ebc75e3c543b434. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZGLM2565796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06262225248bdb3c90a7d1d3bce6a83d4c92ae20c744f90a6a0a1cecfa4c7f. 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/QZGLM2565798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f68a2b3dce9c0474d3314caef9d477c7c35a77b9fc025b53587e966affe08a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZGLM2565799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367e4231bf92cff0792cf017584234f56a166a7a23a3a706ed63bf71a252eb8. 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/QZNJZ2468952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acbb483af44dd90b44370ae4487c7ce4ef69f0a0cec75bc6f22716f08225a76. 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/QZW9L2468870.