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 0x583cf0c3cc6c466503bbb7af0f7f2d287c3b838ac760d028adf608b7edbe76bb. 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/a3c81f26-b967-47f2-9980-4bae94004a0e.json and https://artists.proofprofile.net/proofs/artist/a3c81f26-b967-47f2-9980-4bae94004a0e.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 0x80fa119f193594566984e63613fdd14a8ca59ae121ab8c28354787576b03e17a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAQ8S1620501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe6fb13623bf597428ff3fe77626ee79e5e4272f15dcbe704bc0a91ab42de55. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:11Z), 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/CAQ8S1621128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e110b8d829752bde120bc84cd502c842fb8226de99998bb7b7f23d74fd8ff0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CAQ8S1621637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ced43b051b180c26ea16abffb68abee80debe7969b7aa1038d6c16853c2650. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CAQ8S1622358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415ee6ab4c5ec79fc8f6130f57302259ea716a2fa170feb5706b0b4ce8d9c89b. 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/CAQ8S1622379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d2b0a828bd76061238ab32c1e82d57d1261349e8099a4999422cadb5c492ea. 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/CAQ8S1622860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5e5627d1dfc0b3fa49db3f6c42f3983958eff3c4a54fdc7fc934e3909a3e18. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1624196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7620c9e11a3d373fdfd244b9144d5c5cb825973e3685ac01a72571de9e4ad5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:19:29Z), 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/CAQ8S1624305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b9c60899fd571f0698e7cd7a22b8082e2f678ab15b2d88092bc367cae28b2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:14Z), 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/CAQ8S1624600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b765870826d14c08f3218524a42fc61ac0bd100d6c89d8d6a0fd60d59a2977c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAQ8S1625188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb7e657e68770a40de8ca75b22f6ad6d38c72261a6a66c0d19e011728417ee. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:28Z), 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/CAQ8S1627642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a693c53434dc682a1b5ee5d6a9db0bfffbd2da8ec5a22b3c54fa888cc8de4fd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:37:37Z), 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/CAQ8S1628310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c30b83dc54694a119da485b59d6eb455fccfd8ddf84504dab505168b86fc84f. 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/CAQ8S1644775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5414a8162e11bad32fe2548543f9cac1ebcfc1a41c06ea220298bf6b6df187c. 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/CAQ8S1646056.