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 0xe2405220e50134f1978bfd41020d309aae07a5e716b248225ccad0df1ab65205. 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/da7da9a2-e164-4498-8cea-0aff7d440797.json and https://artists.proofprofile.net/proofs/artist/da7da9a2-e164-4498-8cea-0aff7d440797.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 0x18bbec33e4f3ca5be678afaa049a30ed069b1b3ada60c29f01b519a32121b31d. 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/US3DF2407393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7783ab14befae994a65453069e0f436357540870990670ccb05ca5f52f925ea. 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/US3DF2407394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac5094845435e2f73dbea2c0eeba6fb152b0bccf6aaf7722ef23e344cc532b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2407395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551492db41d7e1d7c59b969f22c1d5c55eac562e014ec19c9456115ea0ca8db. 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/US3DF2407396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8adabd67b8bea1cf7795e86ff4006b7048b6487dd5eb92bd7b8bd8b6834e6e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/US3DF2407397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977245fa4c62570761d78aa81cba73c776562375adee7253f17c4d5acb55838. 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/US3DF2407398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429d73ade61461a3bfd33ba8473922145d8081171787971b7b490d3dbad7e9ff. 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/US3DF2407399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d5866db0480b7fe2d0a8b8cfa5ef914cb18b918b2739fd52a6001ba89b1d5f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:09Z), 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/US3DF2407400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab76872efe34a447577185e6207c526152b54e6d5267f79989344669b2bd93e7. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:53Z), 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/US3DF2407401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9176a6453dc50ec7ce3d7fee700c8aad8c8c4caae5be9d4af48677a88185349. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US3DF2418193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106ecd0f97f905a57b253b74b5b45fbd6cc9570a7766d7b7ff530e6bf405438f. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/US3DF2435792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f824ff16393da6196b4f2ed509e942b4ec98e55fcc9f361fd9ca2e2957527. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USANG2420538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f8d2679c97ac1432eced9353c521bcfff75e73bc58a482542a7436a014c42. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USANG2439001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346f372023ac1b5b5098936411653a21e1576e5caa3a18b5c0e191a22353a85. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:02:56Z), 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/USANG2458409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f4e9aa384b49a3ddff361520c8305ee728a430aaff0d8803c70c7cfd99c2b. 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/USANG2477993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebdbaa81727db13b7dbe019ef1a39a36873036c3d4ba39978ec1d37316f15b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:22:37Z), 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/USANG2499687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9839216ca26444b269f770f7953fba1c198097d9c704de933bbf5f12bd81c8c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF2500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8f588352978f66f2c423b8af2b07addcd2f71827c4b31374f8796b6a9d9188. 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/US3DF2512809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ae627b6a124207dd69af7132004c27bd35f7b812b6cac05b10b4595bc41dd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:33:21Z), 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/US3DF2538096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea0a473c814336ae98edceb294101c63d264b03fae74e04622933e2e3fa9a4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2567862.