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 0xe81f7491ef7109739081927e75ef28241c793042cdf7122d7bc37218abe76f5a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7deb982a-58af-42f8-8be1-9086a54c0bec.json and https://artists.proofprofile.net/proofs/artist/7deb982a-58af-42f8-8be1-9086a54c0bec.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 0xfd68a9410ef59caaf0b1e174decfcc088dd1cb61898214faa9c20e0f5d9b50a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL5840408399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d67f3e7a1fbee799170275d34f8ce23c5af47c377bcabc72d87adf60b6b49. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/IL5841514136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18658dca16315688678b100db5af8e83d9f8e7ba557fb150a43a2851e0b27585. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/IL5841514142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb46ef26388b63589828d9c0f2792c166b87bef960541b65613781530d6891. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/IL5841514153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025fea4e45932be0da0170bf8ad2227dc1d17826328f84207897384d12123dd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL5840508409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d9eff6d0b4627a902fabb479bb5af7a6dd529c00b9f8cc08d428aee29759c4. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:16Z), 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/IL5841514135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e7c8d45f921f4f488da2bd03db921e2511c554921b779477c5d686ec8ab098. 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/IL5841616484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58cbd9b091d70180a66a277a1087e79e4ed747692b7c06e9277b8992d242c6. 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/IL5841616802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ec625f4ae69fbe80ff7d5dff53850ef102fefe5a878556703401159b7ba711. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/IL5841616803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d053dd11df0f14bfb60f18016cde3f053b776df781cdf655b3b39a0cecc44c1. 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/IL5841616740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781f5793a7d739074277293a2bca84982d185483e0f4b88d60908c3d6db839ce. 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/IL5841616805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875c34db8834b117cd8b5452da12e40149bb5b64d031bec1aeded616bddf47c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/IL5841616711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629989b91a583ed19a5fd0b79e5adff90f592df99579f79da5130cdb360da36d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL5841821263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab01d8df1c5f42659809dbebe38a212ddf1e5e1ab7bbc657b7711a067c91ddc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL1011122762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f712916c3346a51211ea2daa18a42cc3f1c1ad8328cf8d8b68aa7003a607cb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/IL1011122837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1dc5c42de6298c37b90e053048cfe95436a44ebcdf48116ba5cb3f066c37f. 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/IL1011124559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bda4df3abf384494a9a311941a8c02d51bf2b3b16718f3024feb1bbcab3246. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL1471902465.