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 0xa484a1db0b248947af4241d2f84c4a9d75525ed996fe4bc9352dfe94adc7947d. 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/ea8fb145-8670-4a75-8b1c-1f19f7a38e6f.json and https://artists.proofprofile.net/proofs/artist/ea8fb145-8670-4a75-8b1c-1f19f7a38e6f.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 0x2b7c2ad5f80ae402405b8675ae9361e1170794319561de194263df42763b6d98. 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/QZK6L2026917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49af2edb80b803677149c60cc2f5bc3a62afa6478597875421ee6164fc1e7a3f. 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/QZFYW2159897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a3ca195881ddd77a107a20a69795eeb6fe48dfced6033433eea8dd2893a6b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:41Z), 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/QZFYZ2126850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d82b56ce20a3a3cf631be15e37b06f9f55bdb7fe8862a60e1dfcf68d27b4f6. 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/QZNWS2157497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3114e297799500664ea726b9624547fd6928febeb00a8f38e14534650c456c15. 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/QZFZ62212222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f106872b2aab0754097221e6d18152647da63e98d226bd62a6c0eda5a6e23b1. 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/QZTAX2249061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8d24ac79d303b8e94b497906bf386dc00f19484f2f50c183805bd096ce673. 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/QZTB72282877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f4c3f06ba110ddc4cde4aa2b55ee95e2bddfb1e2260131010bcb82bfa0883d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:38:32Z), 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/QZDA42388052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0761bac83cab753d1d3d54f79584f6235c9d90feaa1b0189853306b2a5f2884. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:50:17Z), 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/QZES62318419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38147ebc99e94a54afa16ee1780d04cc53c960be018321f0a35a02b451c9c2. 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/QZDA82354347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f4c3f06ba110ddc4cde4aa2b55ee95e2bddfb1e2260131010bcb82bfa0883d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:26Z), 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/QZDA42388052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568ba7afc8a6bb012096e8083c41e0726d7810e1d73f9f9c54d0400882733173. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:19Z), 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/QZES62318427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c3b79803c8382cb0fc557bd6eca744b6d49044cbf239cc43b6a19cddde39c3. 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/QZNWS2398953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cda295c5e2506804fb75bc5232711b24acdc2a74ba9577bca82650582321e2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62471706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d5a2f6c4a83d013e23c8056d22a23c3de40bc48dcd1547596bb1255871ff0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42460835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b27df29df848d2028476a22117b23da59066fafee39d3fe3d487e6e0f1cc687. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA42460836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9583bdcedadaf779aba4002b54972773a15bdebb1e3e3f6fa2b0088ba06ac0e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42460837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a57e2b6f0dc43a934cbf97f7ddc13a3d0d181c584b3a9334bf3a83f020450a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA42460838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e07ca0927439db3d218b5d2d812447485328dd2b1cddb4bd5dc6ea6da51731. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42460839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20128aee1414db324aa1263ee25289fa076df03b7d461f3aae1117dc95012c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZDA42460840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f52a85f445a38ca1a55ca52bc39f1c5ed8f0a5851767c182b85d2e65c3dc77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42460841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d0ec2704b019cf2924aa06ea3005a6f6e3c6fa8ce09615ea21d62b88b1c483. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA42460842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b60c65b98c45951168e45fddfc0ef4a837fe3a1ace7ff5c2990f694cb8c125b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42460843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cda295c5e2506804fb75bc5232711b24acdc2a74ba9577bca82650582321e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ62471706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d5a2f6c4a83d013e23c8056d22a23c3de40bc48dcd1547596bb1255871ff0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA42460835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b27df29df848d2028476a22117b23da59066fafee39d3fe3d487e6e0f1cc687. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA42460836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9583bdcedadaf779aba4002b54972773a15bdebb1e3e3f6fa2b0088ba06ac0e6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA42460837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a57e2b6f0dc43a934cbf97f7ddc13a3d0d181c584b3a9334bf3a83f020450a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA42460838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e07ca0927439db3d218b5d2d812447485328dd2b1cddb4bd5dc6ea6da51731. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA42460839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20128aee1414db324aa1263ee25289fa076df03b7d461f3aae1117dc95012c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA42460840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f52a85f445a38ca1a55ca52bc39f1c5ed8f0a5851767c182b85d2e65c3dc77. 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/QZDA42460841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d0ec2704b019cf2924aa06ea3005a6f6e3c6fa8ce09615ea21d62b88b1c483. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZDA42460842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b60c65b98c45951168e45fddfc0ef4a837fe3a1ace7ff5c2990f694cb8c125b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA42460843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a6d1068ecf928f6eda3100d78e88d561251b39d8cde9f3725faa3bf5ec976f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWY2498996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad774557f3e8c889aaf3608bf30f3ef56111735dccba9a6bec02a36d170c67. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWY2498997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff965effbda922e78450834ca5f6b023b97764d91c116fd784bfb3821baadb85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWY2498998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bb557f7c1c4300d1c897efe06e29dc47279560809ac3a3f1e6e9c9d538d4dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWY2498999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a8263db3f971b3ea9a69a1c30cd0dea8cac5302068108bc8f62c7a4de661d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWY2499000.