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 0xa035433092b407bd87e9f44f6adb3ce004295a891117e84f874d556825df073f. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c57b4fbc-a31b-46d9-8d6b-806519c5e76b.json and https://artists.proofprofile.net/proofs/artist/c57b4fbc-a31b-46d9-8d6b-806519c5e76b.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 0xc2a15b92ec7ed88608c15564f159c662a3f7ad6258af2e89615f340b9e3e1378. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2398171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953872b9621a60bf8a5388eed7148a38290c8988b19a1fcaa5a2fcb7a85054c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKQU2398172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1b43503cb85fda32adf318500162b0bb134ad8d214f4f85066c12f88abf40. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBKQU2398173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e630b7439cae5acf60112c2a50300bd3ccf854366b7edeff148a08361af8bd6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2398174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3357e642505e9f379dfd13e9d1aefe8ad762c78e25ffa6f5fd0a738fa954cd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBKQU2398175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226a6476e852255178ac8f11cc8570eefd6ba0f6c7d3bf8b5fdff217a3faac93. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:48:46Z), 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/GBKQU2398176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8cc397881842014f818e4c55789389064a72447c5b976ea6fb6acf10db35ab. 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/GBKQU2398177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87b7a95e2355043d37fa566fd3d067084b4e4fe3b7dc7784f154081402bcaf. 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/GBKQU2398178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20546fe4e39ecdaa58c76817b26af85a8236d11257f00fb1cd8777ebc1f00773. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2398179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8773fac3e9a3d92b7e4d3c041538e054d99ca9cdd4c024653260e3b43f6fc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKQU2398181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261126d839dcac2d826c2aae083c5e2226014254f81526484b52bcd1758beb21. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2398182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551a84c37b9b21a0df8300be163a79928f2fec3012e8250a0832d0070c9c77c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2398183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f545011867913e0172d11a9fe760770b5926d6ffb99ae6d734b4849512b4003. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:00:22Z), 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/GBKQU2398184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8655feb3da51698a682b17bad3c350e55860c70fdc6b523622b7a9ab70bd4f1. 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/GBKQU2398185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb957039a31385f619f32d9ffa902e82fb4ed326881774fe3f6ab567dd6f4ef84. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:48:54Z), 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/GBKQU2398186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8dca31f3f7a22bd0d7a6eff573a586fb65ca835b263458440d71d420b5326a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2398187.