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 0x0c553dfc0fbbd9b8461c53dc6af57d2d7c38eff7d6d98fb89f4c0226b21f8995. 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/e6bb0e6a-61ee-46c7-9a7c-d7149cab4f89.json and https://artists.proofprofile.net/proofs/artist/e6bb0e6a-61ee-46c7-9a7c-d7149cab4f89.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 0x20fd9bacb294952e7c1b881b4cc29cddeb659d7c0d3ada3daf7b45e98fdd8748. 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/QZNWW2202930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e48b8ad1c29a682464c2991b26f50b9858c5d5405f19dcfc515d5592b5ced4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR9W12240254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd04edb7b3b9f0c6e29e047ea09ca6260f8cc1f3dd8f2c2cb76aec6720393b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBA2295864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399a7016de416b82aa1ec4945471476acb2a98a4ae509bb617809113f2f98a91. 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/QZHN52360571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6da120667f831946a37b5c39d427c66accbf0d3760977049679d27dd41e166a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6Q2366651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1853ef0791cfd6db431b295c8aa21fd9c67e273146a64ec32b672ca741569af9. 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/DGA092362266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395ddd8e1343ae4d4124ee3afe44a18562400387940523460302dac00801c40. 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/FR10S2467678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2dc342653c9954168bb38b77032a5b610b19d77498d67aae9bd5e85525ee7a. 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/FRX762435179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ee056287a877a6e9501b5abeab0b0b778333b51a3f4f44c40b9c829f62ccd. 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/DGA062409809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c9c499b208f9827eca032ffc720719263a02b76b9d6427ea096aca241bfb0a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DGA062481469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77748ea33f470ec4fed1a2ce8edcc6eff80831c8ec981d033e4519e1a2ad609. 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/DGA062481470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ee056287a877a6e9501b5abeab0b0b778333b51a3f4f44c40b9c829f62ccd. 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/DGA062409809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c31c22de41a3b57d818341b7d344e5a2dbf03f9d3b4a7dbbdbdaa15960be2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:28Z), 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/DGA062481473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c1fae83091911919440dc7854c4871edb18d69bbf4da902ebcecefc9185728. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:36:09Z), 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/DGA062481475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb637ac46896c56366107dbb6fb226b467f0bf3f2101884a784d7eccf6ae900d. 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/DGA062481476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f1b3cdd45ee16a6414f8e96681c3e38cb7d9bf8d335e3a802d627909b7880. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR9W12535189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362170a3375d404f7bc87f93a91d5f9a388178bb9dded27b9631065483ae2d4c. 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/FR9W12363078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362170a3375d404f7bc87f93a91d5f9a388178bb9dded27b9631065483ae2d4c. 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/FR9W12363078.