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 0xea9ac0125b11008e5b9f7cf016f266725a400fe133f077cc46f6d5e0a1f17e00. 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/e5bd2311-22bb-4400-b709-4e05d7110564.json and https://artists.proofprofile.net/proofs/artist/e5bd2311-22bb-4400-b709-4e05d7110564.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 0xc218cd5dc7ca78b52e3127ce16aa52898bb0558766144639d437965489500b5d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:24Z), 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/QZS8H2103743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203083578cc7d347eb6fa432e17c517d805b6f6cd9fe5e92d2e6b77313df87d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZS8H2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04544bda768855cccc06a8378440433d66416936f9471c5694fbbf343b46d2dc. 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/QZS8H2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9cea23dd9b21a6cfb64b7be1296fec23a14342a177a33e1b59a86bd16c8d13. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZS8H2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203083578cc7d347eb6fa432e17c517d805b6f6cd9fe5e92d2e6b77313df87d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZS8H2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af36fdd16229c336d7322e83af510561c87ecd5f39cf1dbfba7f4f981e70d84. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:06Z), 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/QZS8H2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04544bda768855cccc06a8378440433d66416936f9471c5694fbbf343b46d2dc. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:19Z), 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/QZS8H2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9cea23dd9b21a6cfb64b7be1296fec23a14342a177a33e1b59a86bd16c8d13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS8H2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced29841709eefe3b331ac0a7a97ec58d87f3811d3b8f03c3a2d28ca51f56f2a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS8H2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac51afb7b4bc89af14eff331ce9679e29a6bbc09445d9c710727e00bcc887c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZS8H2100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777190b547d770e98f022934e0e894fb5520c365a7a874f1af0d581203ad28f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:10Z), 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/QZS8H2100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f9d3350ef3135a53e1d575810366124daf5ffb83457278126d37c1304ac41. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZS8H2103423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2915d7b26f95d311690fc5efa0c1bfb8e9cf75e7128c53cbe8dc9df261604. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:11Z), 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/QZS8H2103341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad7d9c84214c5b1c000cd729362b89088396d0a1420e03be4f5ec06b8b51e27. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:40:53Z), 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/QZS8H2100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0f863710342c228b128769f342a5615fcff17922d7c5444cc66d5f998b618a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS8H2103967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aafc540485bfe6f79bb2224764232d5fd53d38cc79f6a39b822f394ec6779a. 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/QZS8H2106758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5431148fc06e898e8fa6e1474cd8352d040479b44cdca9ddf319cf7ebddb4a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZS8H2106961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b133a1a86a3b5e9c53bacd82116633dfacb16f7709bfc97419bea6a6ef92c06. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZS8H2108332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f43b9bbfcdd68f49d852702db07fb9c2c2c02bd01fe88447ce7a8b35479db3. 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/QZS8H2109456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a2128edb8c879585f06b8d3dc77e6e239f9c88f815f492ba6ab9d34275711a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:32Z), 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/QZS8H2111895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19f9e4bad885e5d8f1fe7a853177cea4df6b7ca953f70ea84666ad1e9a144ed. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS8H2122257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d417aec8e63f665da086a879e3a3c717b6488a308d8b556b9c7b99e0c863961. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:39Z), 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/QZS8H2122387.