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 0x73d39636b0e06f5253a6d2432175879f96ad1728fe28c2cfd42a2afc1d8b7ec3. 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/eee63103-6fe3-44a7-9dc2-53e683e50569.json and https://artists.proofprofile.net/proofs/artist/eee63103-6fe3-44a7-9dc2-53e683e50569.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 0xa0ef734c26cce43175aba0850ec9ecad5e9eade67c330f7bbfe6ec142f853b84. 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/BRATT0800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe349f7b12e2f8810e36919c179e9d08763e333ab7e07abf77b4b406fdcf69268. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:46:34Z), 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/BRATT1000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d72d0f24c6ef6c58d0a21415d02ed68260b4b548da513e4016c01ca3a128de3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRATT1000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcd7976a831a5090bc35de8bcffa32136eae25327a3bade47d52829a13b7a2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:14Z), 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/BRATT1000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f72796a76de0e57d0cad6053c3af3aab3f7482fed62bbcb38e93f3aac9e2760. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:05Z), 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/BXDN91400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe875b59d661ab9116539556acab8d965d9618e030a691e635d3b14fbee9235c7. 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/BXDN91400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df2cc46385b6f6c9665b937003f143ca5a026b5fbfb0df1e669f7ab234b3b07. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BX2AN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74989ac847735ac74cd05c128f9d8b93beffd560feab4a59dea3a734bd757276. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BR1622000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c39655ea439314ea771bd251f898b350654310f3ddf05359c1b419b811ddd7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BR1622000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63993d795d3318ff551ca32ebef3456df2cc868cf3e3c9e3b190a53edfe93fc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BR1622400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b407f4460e7e1def2730cb3fbb006d7741d05280522be00e5d3e703d0a310b7. 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/US7VG1327688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b8bfd69eb53f85018f96550bf0ef88cb5c55adde556fb01a7c227c381c4cd. 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/BRAPD0300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0faec6e35aa8c88efdc0ec11831fd2870982fdad3c6f3100515f9a2c7a48e5. 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/BRVJ90800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c2b528de90abc3e0fbbc48da3b898c0cb59cb64d4033267977a59bf7d1d006. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US7VG1876042.
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 0x248242f1abedc38aabd03054a0c62eb2f5c6f31b6d5dcf9c4527252532410f4e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BR4GA1100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ec0ae81da23d1e0ae8a325ad6e66632d5806ef5b9754ad8adde19e8241d18. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRAPD0300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e4dda8dd2c212690bd41d722f5b74e8656b404a961947bd2a2e4c711bd2fe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRAPD0300037.