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 0x4c0c08c569da416dc7a50cfd72f7414037293d8c4782f7873174ac013b0f9b5f. 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/ba3bab45-0ff3-4a36-8dea-e74e5be060cf.json and https://artists.proofprofile.net/proofs/artist/ba3bab45-0ff3-4a36-8dea-e74e5be060cf.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 0x5c90a2fd1e87ce8193babc6902a2dcad3f874b4d4cbe33a69fba3f520efafabd. 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/USDXS1911681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84eb6137bb9d5e01f00030e66126c80adf0acea14d6b96154529c28026b5d0. 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/USDXS1911671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aaf7b26488eae0f05280b56454f26b8548279bd0f4c46a00d86c66c868e71a. 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/USDXS1911672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b195ad46059cfec9d51559f2bbfc2dba61ab2a31a69020b86b2da342c8d369b. 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/USDXS1911673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa583249b6f141f2fda5594ce730f75d62c7bd1cf63f0499628067350afa896a. 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/USDXS1911674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e264a2307e491f1d861c2e5b473fa2fdd81e0fbe6b31580ebc0fd894d1e753. 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/USDXS1911677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09866b9c979149d9c1d4dea952acd91c9cbbc3d79f99c3b110e0d768bc69ff84. 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/USDXS1911678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212a5e0412dc00ea7889b65c5ec5e8403204caefba2af9114ceef7a7d3bda61. 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/USDXS1911679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458230618d8ce7fa54297e6d1058bdbfa9371202833e5d352544c478a28f7049. 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/USDXS1911680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba2239520b2482449cdabcab74481550b607882a3d4979554da7e01529fef75. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USDXS1911675.
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 0x78d9cbcda6ecb946639051bb27d6e903d74cacffc1d971d81f6b61406a839ec2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDXS1911676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49813e9e4b3e146918be1f1f206168c090790bf2d41ca0e4fc41fc3e4ab2c081. 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/ARG991027800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b255d12de543b378b7b726f6051720a82ca1e3b79a71816de31b085bb27436. 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/ARG991027803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4662ed324c3a3936fb250a5d49c26e35b0d823615f53afb4f9bd69b3e025d100. 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/ARG991027805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69936c0d16c8474a6d2e92fd5cb0c24852e8ad7a80fec0e159580506f515136. 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/ARG991027809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc30a66edba428a0aff6c8a98588bcf9208a1c576e4b588349e4dc93b3d6a58. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ARG991027801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c5fe16488e5c40cdd42032b4b25e40ea9ba1d6a7c0d4daeecfe6f410743017. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ARG991027802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25c61dd9cebeea740c1a127072ee61188a83d6d278db825f82426ac881abcc6. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ARG991027804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4770b92df1aa5554fcc8fe01b540e4fa4efb6f420555b81886101a30da4d0. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ARG991027806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d395eaf4e84065e33f34686284f1749fd98f8b79259bfd0e43d237ab86b59c6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARG991027807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3e1ec8f4e06202daccfa07d03a3fafd3056ead6e2c6829a42ed340f8959674. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ARG991027808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76685586d435c3cf60177dc2350238e14e8bba1a5718524cf82d624a7c347d0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ARG991027810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894519ba5f98c7d4edf2550b647060745a95e751d2af69d7195bf5aa1f1b118. 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/CA5KR1954986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c302c898f2bea5a8202e45953ecca563a99afddc48ec6dc9086aa883d8148. 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/CA5KR1954987.