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 0x1009d6a9ec34fc6299a72ecc0750789cbad2f2cb60f2956a5c457d60224566fd. 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/32e3be6b-3ef3-442a-aa3b-8960cfc8c387.json and https://artists.proofprofile.net/proofs/artist/32e3be6b-3ef3-442a-aa3b-8960cfc8c387.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 0xfb225d3c620bdf84c426b2c4453b06d4c665fd0bffc0a3548580d287bd032c7a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:16Z), 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/AUGBT2234708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc9dd820f7832ea1e47e596295bafccc1b5f854a1a874e387b665b9fa40d8ca. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUGBT2234714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61cf3aee88ec822406634d2599e1575a0727a9da7e28b96ff7c7d97dec214fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUGBT2234736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104ca2eeef77b720f2bd47d583125b9be594280546f7dc01f0ac38be3284db7e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/AUGBT2234737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c242f13e3788353448ff9253110064a107bcefe782ae8cfab536ea98ba9869. 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/AUMEV2329499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f69179b5239ca18be5d21ca0e6dc6c9a1c597440530879cc3d865f1513ce42f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUMEV2353757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507249e9616819128ab3f85c4a422938dcdfe5a5a7c3a826454be43c524e5392. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:25:41Z), 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/AUMEV2353758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0275df736b29a24b44896b3132a4ea018d85c0b2a91a052d2f6e1f9f302425. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AUMEV2353760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b49d491ca31be2801ffde1933caa2d9bfbfcf5f934906716bd1e3fc473fe3. 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/AUMEV2353763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67503fb2ccaf1739b5858cfc4f84e2ae8a469285b78f6bec707bad1de9103be8. 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/AUMEV2353764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0639111e2d95fbace80e8586608c3877b0282d9ea3499d6f300a58401e58883e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/AUMEV2369346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac08d134a398c07e46c2bdd343b346e9b4e04ae2b3b027580854b2b16384da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUGBT2351048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97d3e2b2f0a73b4307559e0426d712c81e05f6f44286935616580a6b2b25608. 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/AUGBT2351049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc671ed50cae465f2b2b7d8b80971049f793d4429ee3e1a6fce5c33ecd124cd. 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/AUGBT2351050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05321c31b1db043ee7315ea8bb00ffe11866ab42d5e896c399d337325a836c78. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:17Z), 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/AUGBT2351051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6471fcccf82fec45097c3ba140dd900069cfccc5daae14744e1db8230a0e40eb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUGBT2351054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe700fc5ca233084e1bd783bae6be5f9326b2c50442b32c1b400cc02ccc66dfe3. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:57Z), 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/AUGBT2351055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a251c30edaadba4bd775eb43358b87fad2a75502abe1c5a66822234906c302. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUGBT2351057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df627ac696c596298911801ce15351215f73f8ebfaffa37ebd3a44a3038693. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUGBT2351058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5137fe15fe1e6ed7356415133ab0bdde33c1b999fda2182cb3aeec6c865679. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUMEV2517185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e62919bcfdfa6eb0a051f52249ac94b27fee4ddfd74c11e413e76ea73ba0b2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AUMEV2517186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f5e9b8b7809395b7ac1db12173c49526fd8bbeeb767bfdab4fc32eb482598d. 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/AUMEV2517189.