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 0x85e99c124f3b45be223819aa0170aa509ef90698c97dbad98d48452cf0ebecb9. 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/c360a98e-8a45-41e8-bea5-988e1ea08a78.json and https://artists.proofprofile.net/proofs/artist/c360a98e-8a45-41e8-bea5-988e1ea08a78.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 0xfd78e84adac901eb808b27b82cf7f7f274634be6ebdd6cd55439fefa8700f007. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USJ939670169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9392b707aec317ae38fe6e2cf01f0e205e11331ac79949e1e9457880fb26d2b. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/USJ939670170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df5c96dfd23f9a61237c5b0d1b77e6165c2c175b695e362f7b0d1065507987. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USJ939670173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e20a29a21a807a9e15c53c93ea132d3ca90e9bd304f1637a15d524815362c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ939670174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d08a1d83b9144107f5ef9121796051e92ed92f05389a6c7f85aa57b2e22c0. 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/USJ939670176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08174a38b920d3a31e8d84e339f8c235ab8cb137f2f8368941b4993ba2c5d3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USJ939670177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aae9e2784f5676bdda753454a8a37de311e0d0a063bf867a5961466eae48d1. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USJ939770060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95a197f8544bb4eba204181a57b22c81a1674b5a782a5d4020e5fe0ab348d3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ939770063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce84c9fc22e4db80e09e91e4c508320ce5ea5be66f7f57880f0b0e4f7253387. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USJ939770071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff28ca4452c7b02a984e35f134d038255feba8b73eed56be02563e781aa8a0. 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/USJ939870130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea5b10618237355de515f69b7919523c8605313a41d1b95bf612494fab59286. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:46Z), 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/USJ939870131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36b9479b90c8736bd425cae0eccd1f104f432b5df6baef59cfd95ef7baa836. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:17Z), 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/USJ939870132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df36328dd4393408d95d525b2c62199f1ce159886933527f9b00e574df3a20. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USJ930070085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd02e9a3e522f14d30b6e3803f2fab59a7980469fb88d136aa923870ea64e4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USJ930070087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237583b678eb2a2fe308101be2bb81523c3ecc0e093534937cc387787700a161. 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/USJ930070094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3c23ad3f23cf2410a4f0f898ef4f65162abcd1e49aeb5ed6a8a082b4e4cd4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USJ930070095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad8f8d8a3e32cd785b6001b4ca2fdda2601b3929945cc3082797bb5b8df3a0. 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/USJ939770072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1566245b7a0d13f0b6627a7e31a3ee37dbfacc6203feb6a596e4dbd3e6f343. 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/USJ939770069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49ecfe98fad181f1d774ffbb1563a17b0947ec15d295e9f14fcc128c9cf15e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:54Z), 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/USJ930270370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315fe306bfb0cb2f89eb5c669b067276bcc3873ea5b70a3352bf5daad65d855. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USJ930370280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0b918b98e6bbd200e732f6ae8d60d6279455f3662ddba89ed136112b69e606. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USJ930370281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca8f1c1c64492419a67d645b971a012bc0b8a40d1cee40e0e375ed03390180. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ930370283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a6c1a64af50caf7acdb3b944b666cdc7bee3e23d88cd0bda5953b2c78fa33. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:55Z), 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/USJ930770288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1222f0b8d417510c6f02b699d7c6b71a8dec73ea5e2cc3de63744f70de45b020. 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/USJ930370289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2b7876d82d9d0258a5e1b56a2c338eb876bca335ebef6a1e5e7a937a096129. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USJ930770165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9669344543ec308f76ef59fc2f47d98d0c4293982ab18d8dd22448ac2175e8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USJ930770169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb7e2be6afcbe83b126cc9dd3c9c434300c05993011bc4e6192868c2a1a042. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USJ930770171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0d1b65e540ccbb146d5734d3db5c36f36e7ce7400da68a0080b9efedcf17c. 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/USJ930770176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c991d1066dfb9f6f94204ae1c1c0a9ace2d2a8b4769a08f1940cc29f29dea6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:00Z), 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/USJ3V1265942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea181260c3a4b02b855f322750a1571edce85307ac3b8ed15a827068e40e2b5f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1265943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed679cf207529f6e453cb0132c50c79a6c8d27376715bdd86c9f291184c92a. 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/USJ3V1265949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a72d6612c4921a39b1f1ca9b1b860104733e55ac0d4c04a1f3cd46ba7ab9c4. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:20Z), 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/USJ3V1265952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ad02debc7091196ae8abd77e87d93251ed6e0a4a202f04b70d599a91eb27a2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCACI1587498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac524e64b9a47bf2da80c868939f041dd30ad6027cdf5ca62a729790eec5db. 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/TCACI1587499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd930845cd4862f104cff681da27f2f06c5fdf093697798c4d265afe02e93aac8. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCACI1587506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea9efdf64212e28b916b1f56e6a4e06d4c871c861b1b812fb87b9f5a290ba4. 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/TCACI1587508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1440ca056dcdc1ab9404990c30685879f46840710427e7677371ca30545be73. 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/TCACI1587509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b210246ebd91ee668c44ad7a132ce428ec000e98e28ad94f63dd71a6467aa8f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCACI1587510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc492b2c6c264a1fb68e2ff695a2e75ea9f009cdfa203c7360df79a505bdccc3. 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/TCACI1587515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496888c6030f1cd879c9d9759ebb63eb82cba6a6c92e106bd70926004b1ae436. 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/QM3DF2125023.