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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405838da544d65599f46dc774b2cd101b4a3b96280fd7247ba782ffeeccfe410. 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/4894d2b8-a7e9-449b-beac-06366c3a738f.json and https://artists.proofprofile.net/proofs/artist/4894d2b8-a7e9-449b-beac-06366c3a738f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf959417daffdb6063983d3f33f2e07118ea01b8a853cefa776b39663a9111fa6. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/AUNV01900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46931734bef70bc37ccf3140ee10702edc9310b34d1d120240b5a882dbe32806. 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/AUNV01900418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760dee1bf3ec697c2992233ef690372952c9dc43c7a5d6c2e25d83fe44c090f6. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/AUNV02000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e13bf1673abc9429f73e0f6e67f949aa310cde4508026cf58c358ce8af47397. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX202105711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6974811063f064ffa2f070515f590debf499c2f7a1e3b22a296d5ad111f063c5. 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/FRX762115343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd407aaba7ae06862db55a4b689d6187fa8a6ab65072a6a0b9a5e4a8be2b1fa78. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX282292406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc4a64147e4f5776e01f8cb1c832764daec940405c001354a6847c878d26d7. 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/DGA062225567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4cf2610289db2f364b39853848abcccfe62004e1be7af83c58bec8763c549. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/AUBEC2313466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc874f21d7d5b42a5147ee822adae4860660b915a5238099b4fb1038b06158. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DGA062347766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dc85152c7cf79b93031d4304706a5b5982df10514fc3ecb76ddc3eea23ea9e. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DGA092379987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bcaf367993513472bfc8c323d6c52a33ef28a107d631980f211ec6a8bbd000. 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/FR59R2493342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc4a64147e4f5776e01f8cb1c832764daec940405c001354a6847c878d26d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA062225567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111fbfa8910fba22029c4d982ab1b3f454ce4776ff64796b53c62d4d9d5b2cf2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2510021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc277fb61f072441bb15b1f1ebf2e15899ae28961f3704996220c7ac215fbc003. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42554128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe34868138708ea3b3b9f3115a46343fd7c23f38217a3d5b6f670bc64fe3804c. 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/FRX202511894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777b2a326c1ef4f8fadaded0e336f0fe1e80c7890bc918787c151f40b17aca80. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202511895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a61707f606af74911cec67af671413a5609d5fcaaa99b36a8c6c0a4c70d89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUDZL2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be00f84be1f7c22bbdab046ad7f51dfee4f8db48d40fbdf7ee97ef70642980. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX202143290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be00f84be1f7c22bbdab046ad7f51dfee4f8db48d40fbdf7ee97ef70642980. 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/FRX202143290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737540ef2f16e57f2b180c274e61415bfda018dfb6f6f1556a2fe2286b1e6e0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762139488.
Collaborations of Very Isolated Delinquents "19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bb856a68312d139fd8683796e8747d5853be2341681a7bca438f29123cef1b. 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/FRX282027930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd6b679a34d9b928f80c19992e4ec481a6674fb297b2a67ee80f7c10033186. 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/AUBEC2446417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe683b56fac3f530557f73a147946ae8af11f0e318d38489bc20bb044b75f54c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUUM72000954.