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 0x71e605808dd1bebbd46841602db5a01f62b8048c091b205183758fefd0f3665f. 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/1d01479f-03f7-4e3a-b3c7-74803607e5e2.json and https://artists.proofprofile.net/proofs/artist/1d01479f-03f7-4e3a-b3c7-74803607e5e2.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 0x64402b8d975bf4bd9ca623734cde8b2ca3d66103674e17d7c91ac669c889aa47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2199252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1b7ae09bbc67c1566b01aa73257bc7bda92d2ef9f2117598c126b6135a9e1d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEQ2204416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265be0660fda7a2fd5a0a6b033c03df03d5842a2b35e85e79d6089f823fa6389. 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/QZTVM2262419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b64535a0755b7f71cbb2ef1037faf18a796a5d5cc5e725c70eb6c4733b497. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMG2335073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244244bdbd5ec414119d2599b79bd6c3cf577eec6c6d54fef016ce91e2ee67b5. 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/BK4DA2317112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac5feb75da0d38ed0ce9b06d752f61ecea58948688758b3e3f20c495646146. 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/QZW9N2216001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f08829f0be05fbbf92c5fea1bf32f219b79b0e9a1e5f0d1646a8a07e60a5b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2238338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51fd92ebb0c8853908ef5a28e83a570d6ee87d2339b58c1f4322d58225fadfc. 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/BK4DA2301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5319be3680cef8a6bd2e90120de2a19303b88562e5c837cb7150ee4ccc61b7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62154973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f2147589bbf2f8e4a53cde137f93c9a6a566627d6010eff3278f6458fb233. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEN1917939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac30fb6aba04bf2a57037d22cf0f05bc1b594359425cc478599194e496736a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2406935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7656181184625c0825ddebe90a2a75c928ad715116ba6a8d31f4a2b9b968f75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES94B2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2220271a03bdf8465459ccabc3fe8c8879b40d6a758ffa7f26068d11a912d28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2425073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24c1846ea8b8b15acf4fe2d124b3f574dfd6bf850f80ba1256a73a4ec641b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2422029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb06029e890ac21835b0bfdd4993244faf3e4c89a79e28abe09e1c79c6bd119e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2416718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae1fe3f5e1ddc8c9902cbde1bebe7e790ec320352e5bfe4d34b41422bc7256. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2416721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf696ad4f56d4b036c6c8da41367f2d11645caf1030cc09ad363aea2b60453d. 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/BK4DA2416722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462acb91b0cbefe25d589da24bffb81d14ebf751086f349003378d1960558ec3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2416723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae720d2cd1f1b667489cdb7d0118e79bda8409a35fdb8e434c928eefef03abb. 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/BK4DA2416725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c416a3e01c84d8d6800e5a866acdab85693ec7b612a318145ccf1c21c868d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESA011870270.
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