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 0x74012c880aa85049544c7ee9e55ebb115857d1aa73bdcd807918dce9731524e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed5fb6ea-9aba-423b-82a7-bd55ebb62260.json and https://artists.proofprofile.net/proofs/artist/ed5fb6ea-9aba-423b-82a7-bd55ebb62260.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 0xafcfb4375c61c10e5f2c4c5590e65f8d6aa94f96156eaeac6c2b37ea9c3bb785. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLZ2G1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce8c663d43e96c70e77adad7b0879b95fddeb984a66ec8844ad382ca491599. 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/NLZ2G1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa11f7787ff53e0204982118a1c87040a23ff0e724de6aee7eda5d3cc3662d7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLZ2G1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78723a4d18d068ede3e2872a00871b425a1230bb085c7db57fca19e6637442e. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:34:40Z), 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/NLZ2G1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa539228face407181787edaf269192c95919bc65245cd099d1f3c547076cd956. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:03Z), 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/NLZ2G1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcfb4375c61c10e5f2c4c5590e65f8d6aa94f96156eaeac6c2b37ea9c3bb785. 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/NLZ2G1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce8c663d43e96c70e77adad7b0879b95fddeb984a66ec8844ad382ca491599. 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/NLZ2G1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa11f7787ff53e0204982118a1c87040a23ff0e724de6aee7eda5d3cc3662d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:08Z), 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/NLZ2G1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8a21cf0836e80b2bf62781613e6de3a2f0704cd27d83fcc85d4f848156dc32. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:34:08Z), 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/NLZ2G1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6197d5752f64c3a4025484a41bc851d53b48692c56cde1f1c228730a2f5c1c60. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/NLZ2G1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f003de706ea3d90016bda3a1d76209fd1922fad5647569b2fac32a21282f8c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NLZ2G1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d2aee13500f1ebdefc20c2a63880c0a79211a8fabcfd095a614d0b06bd404. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:11:15Z), 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/NLZ2G1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a3c613b5cdddc186e75d489bcb3fe87031ec483d553efb0c6c83706e999397. 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/NLZ2G1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d2aee13500f1ebdefc20c2a63880c0a79211a8fabcfd095a614d0b06bd404. 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/NLZ2G1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b53f0e9a1a07aed52330a3c32eaea3a96b557fe40d0c0f09db79bc03307e18. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:47:46Z), 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/NLZ2G1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518d3369b0b1072c36f3708bb99a1970f133aeda0c0850007a6e1bcc5423db9e. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/NLZ2G2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2276e6b8da87ee9431553974310a3b44a2b64001a358fc64a6f415c897fbfd45. 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/NLZ2G2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a4d28d6fbf3d2d537b5f9b19158b58a61f24e2b70a820cdf238cf8513876a. 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/NLZ2G2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518d3369b0b1072c36f3708bb99a1970f133aeda0c0850007a6e1bcc5423db9e. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/NLZ2G2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2276e6b8da87ee9431553974310a3b44a2b64001a358fc64a6f415c897fbfd45. 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/NLZ2G2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c4367ddc9cfed3b38684c488410f8ea37922590adacd4cc46e996aa86e1d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLZ2G2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24935b3978174319e8cae16a0cd755f4711e8ab26a780aed9c43ec5ea6700fc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLZ2G2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a4d28d6fbf3d2d537b5f9b19158b58a61f24e2b70a820cdf238cf8513876a. 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/NLZ2G2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0943cdf05dd364c4c2b8b66f3b434d691f8f788514b19ce4e24ffee2a8f608e8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLZ2G2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac553d873b9c5dda61fc19d5cdbfc9d24b8e5d8b3a35e79d5a0dd521440f7698. 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/NLZ2G2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da7184f7c334a6dd0a89022204e1b015a38759c0c6c8ef89c46fe257c06120. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLZ2G2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da7184f7c334a6dd0a89022204e1b015a38759c0c6c8ef89c46fe257c06120. Chain 2 (Bitcoin): anchored in block 958556 (2026-07-18T13:21:06Z), 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/NLZ2G2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a2c112b23506946f173ac8ba3bc698e9258ee4ff2e978a3a0b35b1a2fc4a7. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:42:01Z), 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/NLZ2G2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111e618219a173b06b609cf1f3365ec9459a7a4af7d9d83b75941679a94d4c7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:36Z), 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/NLZ2G2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaef0869a7423e3dc1909f57777641be880707f8ac71392c0be235ee28e534. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLZ2G2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7faa1d148fb9921028cc153a773916198ec13aa2aa102ba710f163d56aeead9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLZ2G2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098f5fcedc7281c9fbb066cbd88141e5ccf45ac1779a3db518ca0e0b6a5a1648. 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/NLZ2G2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7113ed005719f40020f7b19e717138f8303f7f85fb39eede0970df55d116099. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:19Z), 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/NLZ2G2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988938186084d0b68f925ae3bbbea613866b60594b9c2fc179a949df37c11e58. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NLZ2G2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d94a6684c7dce860131341a50eb9521a673789ea75b7af54b192f7577e01f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:40Z), 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/NLZ2G2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d94a6684c7dce860131341a50eb9521a673789ea75b7af54b192f7577e01f. 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/NLZ2G2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dcf8816597cc7be6c164211bf9f2259d453fd6611e656751208db2a8c727e3. 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/NLZ2G2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dcf8816597cc7be6c164211bf9f2259d453fd6611e656751208db2a8c727e3. 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/NLZ2G2200007.