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 0x16be9abeaa9f763014f88e6462baf43bbd74580f995fc1cb0562eaabaaef6965. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99399d3f-6516-478f-a44a-7e86d0632e05.json and https://artists.proofprofile.net/proofs/artist/99399d3f-6516-478f-a44a-7e86d0632e05.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 0x278aa7b7c41a6f14e9ef6c926d6e3d7c86e1123283b3fa3146e5bad2e89bb827. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWQ2105979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ec7e409ba8a376e32abc5476da3d4e10b24c85d02d1b8563d8e7aea339c625. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWQ2105980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd2dd85c0254d4ec4bc5c3abbec0d47d80b4b4bae268004d4ac18bd61532193. 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/QZNWQ2105982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b5f36772c3310ba4cabd2555af5bf29000f6ab2701518af7f0a613a174028. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWQ2105983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed194d6ff4690bbff89c973afee180324d45fd15b23f7346197be74c1537b52f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWQ2105984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f8a62191aefeb1c276dd3ec4380132e3b1de5be639a4b64ecb4e6b433d95da. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZNWQ2105985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ecbc4339a578e3a20cba22f83b39d1a5c67e2a221c3f6818e8f0641a3b3e7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA82271112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9e27b6c8d00ea94b32427a0285f932a98a3ffb8bfe7e7d6562a3dfa3440974. 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/QZTAU2291920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89172720439ce78c7f53e55715b909e86b898973deb51c35109510d168ae9c1f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTAW2385222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc4be5fa6a2e3da9538a1e0afa4413ecad98223e3b7dab20cd165e79056bdb6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6P2472628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f71cca731b0cfd6979e8dd04af0ddac3e9590057608ef092efc0f555849458. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:19:43Z), 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/QZWFE2404390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7547fd4d4338d38413da78c286066db0596fb496a9cccebfac1ebc9d9a6ed1. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:42:48Z), 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/QZZ7T2405323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d61a792a0524561d59dbfa9ae094e7c3e96382a0eec34d3710577ddbecd1f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEN2512286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9305a15b906fff2bd9cf93e09f55571e61b124859c5f1b410c81b6f2b45e513d. 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/QZZ7P2504329.