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 0x5d18527a31c9fac36781875da2b6dc88268d9cddcf0c4ee8b7b17710770190b0. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccc94cd5-3a3f-42cc-9f23-9f9ea82eaabb.json and https://artists.proofprofile.net/proofs/artist/ccc94cd5-3a3f-42cc-9f23-9f9ea82eaabb.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 0xff0360ae3364c519e3cbf2f87f93ba6468197fddcf3ce1ccad3470c1bb11d1d3. 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/KRMIM2220323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5cd4bdbe1e07ad952f2f837f95caa92a974fbe0feeca9f5ab75ec3ac9bb8b. 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/KRMIM2220324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b7bcc200c00b7211b65cfa4ecad3df892fc643d407f6745f424e580544361. 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/KRMIM2220329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa091b50815bd7e31cea9a507ddd48fb27fd622d774730e2781094e54d68e61ad. 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/KRMIM2220330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e73fe2042b5d4910dc992c8fd29b2edf9d74cfed0fd3f7eca5caa8d96a182. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:08:52Z), 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/KRMIM2220321.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16b69bd15903e93151d300b5d63c23778672de27691615fce54bbc8b591eb71. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/KRMIM2220320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c1cf4c4f0829fccf132fc7d4ebfbd712865faa08209cc7445fbbb3747ddf9e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/KRMIM2220322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbc24dc1afdb920bb9d3d5e759ca4a4a9879d3f1f7796aa08efbacda84c9eb1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/KRMIM2220325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b289595123b9982d517c4b01a7fa643a604c0c74ee82314dd97ca2b332334d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/KRMIM2220326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a32e05af3f32894282a8d563e4809d486aaeeb5095f52595698bae00ca107c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRMIM2220327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9032b32789554da96574967360b3400e7c86be9995b3da060c64edbfd2d2a75d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/KRMIM2220328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765cf7d9fa5661c674576daa600788161a3a6169d2b806af458ad3f7f5cf547. 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/KRMIM2177010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b0935806b45bbe7626553f4a9d5e059a2cb5ba5f56df083d1c2958f2f04f2a. 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/KRMIM2177011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4c1bdf70bb9f5512cef79dc2ec2b506b4d353a2c894219be0b5c53c8f1869. 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/KRMIM2177014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1029c3ba66d7d1a814e271e84a1cfacc49c5f4d1d7e81b5d959d32fbcd56f58. 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/KRMIM2177015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7883d224aea508b1f974aae2a4e86bc690368da127558b613b4f4bc63a55196. 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/KRMIM2177017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c856d62606734fa5dfe0d33feb8c022c3bf9090eb0059d8adc050abafcda2. 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/KRMIM2177018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2998b86b836293a645b2cc8fd696a7623fa46b4f15981c03b31da68f5f0e786a. 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/KRMIM2177019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c348004c924857b67e88f64447f3bc226a1c614ca560775204564b8d0e60b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRMIM2177012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2e7afb7095370814f73e51abd63d46c47ed3df10000778a5a103daf5f71f50. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/KRMIM2177013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693102391da06f0a39ed327c7fc125da47339319c98587dd100b0c14306e94e9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRMIM2177016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df3b9b1198bc733f15d76aa90774911e118be6f835d2d9a5431fdd514f8037d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRMIM2177020.