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 0x811b2e2a28f3d9dd1c3f1d483033addf9753e5c4ddc5783e6fe51938b4629d1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53f63a01-7f27-4c8a-9814-743caef70bba.json and https://artists.proofprofile.net/proofs/artist/53f63a01-7f27-4c8a-9814-743caef70bba.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 0x9d2d31ee05a9a902b90698bf6388026c53cf59ab939f836c91e5d5882b57ae1f. 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/QZK6K2058983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f2f0c130c1991826e3c83f2ada5fc0e929a0bca0cf23dbd155e3b3d56fd2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42154138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f98fa2404abd70b26962e113cd36713d13ae7c05ce5f9e05da259240561914d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAY2201619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f067114801cca4f82725b6eb0c7c3622633d5f13040d50a075772fa8b558c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAY2201621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ef4d4f1a201ed50ad4aa659e69e0d8b84e50ea870c323ebcd26ee4fdb37918. 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/QZES52366031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e81ced24ecac6738b799363bf6a9b9a03d830faa12ec38d26d62f85d69ee39a. 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/QZES52366032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3ae173ecd80b9917818ba2394612190854abae4717576f92cc34f906f6916. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES52366033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600337e14c079ea1d0cbc261e1f926a8b09797fa849b2afbe6e267410538c85. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:04Z), 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/QZES52366034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca31a8e7fc948d5a0c35839907cdf5e141ffa2cf99dfb037a421376a65a0646. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFP2384701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b57dca45cdab54feee21d233b572b3b149f2578ed4cb686962c8ac4ab4f7638. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFP2384702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb949ce197fce82aacd4e6a7802586edfe409189f72e0a28b87a4b61396f670. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US38Y2412148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde18a46e8896760e63fdbe9708bda4c5c90fb9285eb8a33e5e46db8b714ac8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:30:08Z), 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/QZK6N2419809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a81b9c0a96b5cd818f2b41ab6ada16d50212c8888a3c2569d43f52d6c60934. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWFR2413840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317ab54af34bcf8a3aebb97070c03fa6b8dad9e6cc5ce22a219beda997f9371. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFR2413841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8b7af53c0e956afaccf852b45097fd5d52cb60f942897031dc659874b492c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFR2413843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd7b8c06b7559760b34c0ee25de331e4e732ed883a16ff4a677e405975a9356. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFR2413845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e8a6873b1b89614d2c51f3b79df0c56f7c5676db0dab008c0a7f2ffa861ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFR2413847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873962b10b56742ac709191b68cdc54b8ffc930a69b6049a9f340ea13868605. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWW2544132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d5ac2b16b36e3b75d19e3f73442803b91a9ca8c584bf893e52b5f5df78049. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWW2544136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b4a5b02c9375e597ef127a9b9e16867d6e958e039fba330aab5079670f2067. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWW2544142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547e25bb8958d1e066cce5781f4876835128d6255876ee14ed7e67d9a213158. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWW2544143.