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 0x0e15809e363437078bea5fd8eda28008afa1d42a693bf9793408c7eea4d4a9d4. 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/a01f84e5-0ab1-43e4-9a24-a11a8cfcad5c.json and https://artists.proofprofile.net/proofs/artist/a01f84e5-0ab1-43e4-9a24-a11a8cfcad5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x5f19d2b82081d0e0c654254f88d50e1056cbdef22bf6776110b3678cf32d8d14. 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/DEAR42417327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f54a228419bbec40edb8db1b30bc1e874c10aa9f9229262f7b4e99c90deb4d2. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:33:25Z), 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/DEAR42417591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3beb9656f89deccf50554201672bf319747420cd1d2aa7f77172b34c8c891a. 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/DEAR42417719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d33947dff0d972a70386f1fbc7dae02547e669027f6e589266e0e8cb014e5f. 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/DE1JN2494978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082b80b3b533dce783d716d00417b84ffdee4a8a6be4a83903525536788e98cd. 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/DE1JN2494921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd4f8dde859951b8049675c15809b0766a14605081dca1ea21787b5372855cb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:25Z), 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/DE1JN2495407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020814403beb0679a0420671d13f5f7cafd5d490e01685f7a379791b4829f87. 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/DE1JN2473406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cadc7a93df5009e2ad6e355e6c9447fdea6f6715bdb7cb57e5242fdb7e9c50. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:26Z), 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/DE1JN2438109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3919789930760d96e917a75e44cee93c030b8ea7d0af4787d73b369be539776. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DE1JN2438251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf11366b7c0240307bbe999291ac897e9573d18f51bcacb620a557cbeab93656. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:51Z), 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/DE1JN2438123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c510b07b58e612ce42b8e0592e4ec214077c8778f4249342a3a97a7458ab64. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DE1JN2438118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d035db444170bedcb7b002cfc3ed4eba0e525c098c754d7997db84c34c4f60. 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/DE1O62488320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b48547ac3d6555de1ec6d6f916a473cb42f8b12b58e5fbbf013dc9226c1838. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DE1O62488642.