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 0x2554efe3335048cbbd8ace068c609f345a0de3fb3ea4d15962b2415dc79d629f. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/105d37a6-649d-42f3-ad08-973bbeae0cd9.json and https://artists.proofprofile.net/proofs/artist/105d37a6-649d-42f3-ad08-973bbeae0cd9.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 0x2326e65154b30b20bd1b7259f7950b4b44ed5abe890dd3874d4ad0d37462eb3d. 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/NLSB72300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb08f34a0a86100f4e43e8181de7a05d62b821ccc87176a60c8c10ad03e313. 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/NLSB72300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4197dbe617dd74e4cf87ad8ce0f17985ed12fa298e1faf9548c67e58bea21b08. 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/NLSB72200883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ad344de8eed838c57feba11be00c0c10a7ad24019f8e0100bf3e3e2acf2432. 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/NLSB72200890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248cae6b2260fc796d2bb40ed9e5d0f13be0c2a00f49c7ebd9c7f26a31cfaad5. 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/NLSB72200891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cc7922806cdd280f47eda2a24bd980497f4aa5b4be76a1eded4d029cc8f6c8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLSB72200885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc321c4a62674c009439e4bbd318eb15e6a6e8a41075027a1356c2b43b263aea0. 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/QZDA61839311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d9ae81dba5c54c8d57de868c7fe86ad10401f1d2c75be281c9b76c8b694fb. 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/QZDA61839319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32feac4ccf5bc5379e18eeb3293ae02942c316a02b557284a4407b0d2b5c1eda. 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/NLB602100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665f30fe68779b550f4ef5ccacbfdb1c4d637b70b2264c521f1f8029a71ef9d7. 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/NLB602000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc2feace3a1ad37795daa303bd922b2155771d7a1d403c036b7846b7ff82a6. 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/NLB602000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582e20b40a92f2e396b79cb0f391abcada69dfc26ae50509fc81c58399e8474. 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/NLB602000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582e20b40a92f2e396b79cb0f391abcada69dfc26ae50509fc81c58399e8474. 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/NLB602000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc2feace3a1ad37795daa303bd922b2155771d7a1d403c036b7846b7ff82a6. 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/NLB602000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34005960be649e0aff0e6e2c21c862c805e6068994924981e48986269c98ef6f. 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/QMPKX1816971.