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 0x002e959ce656f8b6ac0646633e438f211dec7d8fbcaf501f9e00f27672bc5d50. 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/f2361614-b223-48ad-837b-99e21478edb9.json and https://artists.proofprofile.net/proofs/artist/f2361614-b223-48ad-837b-99e21478edb9.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 0xfb86bbcb5c6c77732ab0fc2af7f399adfcda289a7c8f4d2f9759a01bbae7180e. 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/DEAR41335327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef5957cba793641da52267f824e73ade24e55d6e6978dd181332fd2a6f5b315. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLQS91700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d4bcfceb8027221d917b8c6efe314a43a898794b5eb18e608bd3008f36cb4. 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/NLQS91700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17c1f0301c1bbd39e1304d63c2ff854d8caf8d5172c777fd01792f3d722704. 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/NLH3Q1800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58feb557df907befc875997c7eb9687caa96c7027875177335900f96b67c78a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLQS91800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61cfdd13932c85d5de5a119d41f91f8375c8bdb057c19a4dacd06fd8c091572. 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/NLQS91900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b3a3003c7c1c32f49b25779db66879cbc77f28b549203b7e46282a114d72d4. 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/NLQS91900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079dce3564a8cfd4e956f9c903dcaf0e47a073ef8f9c4d805d195f7d25407f83. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLH2P2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bd496d16895159d86db4c2fd27b974e8d01ea46aab7d78a8c5cccd5fd4fd9. 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/NLH2P2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa63489da4fec510e169cc8120230604d6b883fdf9a2e76f1ffe10a3946a46b. 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/NLH2P2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeaed4433fd99a5e3407081e902b744cb61a2dc30c4f27301befd8d5e6c9a8b. 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/NLH2P2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed65e9b8440e624fe6cc4bc92db23c68d748822bc0de0083ed88d43b8af42a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLH2P2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d5860ddf4bdddbd184b4078aa965e7fb265dc7cd535bc219ebcbebc86572df. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NLH2P2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f7cbfc11d18239ca07781fec8c4ba3cee5fe63a3fb0f03ea843694bd55ce1. 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/NLH2P2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad6f35290728047b1e9e8e8f4260798b93403d78af82beed0bf09b058b1a768. 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/NLH2L2200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e25c642b39e54af127ba6c7a0a86800a5cdb7bbb5a52456ce8f536b4eee528. 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/NLH2P2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb5d3414c21f40ab52ef96aa1ded2191e7c7a7c8a5bd8c352b47fa72c6b67a. 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/NLH2L2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1056b6f9d8749e06d6c9980034d139e2a345bc7307dcccf273546fb13cf6f27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLH2P2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e25c642b39e54af127ba6c7a0a86800a5cdb7bbb5a52456ce8f536b4eee528. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLH2P2200114.