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 0xf05cbd32949f624c8ffd19c27f3fae3ca7567992dffe3a602dcee0fc96c51d2c. 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/039303e0-6869-43bb-8099-1d8567b98587.json and https://artists.proofprofile.net/proofs/artist/039303e0-6869-43bb-8099-1d8567b98587.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 0xbd1fe70060404e9d35a714b1067dd0dc97c43837c4a9db911050d4b14cbf11fc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0011000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda581847fab2f1c77b410ee983a9ee29b44f368a6347412bf7e38878ac60b753. 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/TR0011000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a84409170861bad90208cb9cb01110b7df8b36c10fb2faeb1612a6f414e6c64. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:11Z), 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/TR0011000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daf1b19fbb56472fe1a971d4dc73a82ecbb0439a60824db6be289f2d125bc8b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR0011000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b2885feb495878c8b84470c0878e2a763dff74ab3c92865e984a153ee63122. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TR0011200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a0d7d818fda4c978328777b41d29a41383707dce7e1287330c657cfda5ae5b. 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/TR0011500632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41474485acea9c4a160806066a32d848224a0763d52267fd597f79528151296. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TR0011601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2785863e1b2ad8cc38bd7c21942914a821ac5906cfa1159e5d7815c2680a5965. 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/TR9491200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bddc8eadb277c6043fb931cfa227abb34da399f50728fb6dc26aa16af3bf10. 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/TR0011700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41474485acea9c4a160806066a32d848224a0763d52267fd597f79528151296. 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/TR0011601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee098457c0949824912b4457eb4db6749bf3c8122fc1d37388465ad29ef439b. 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/TR0011400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642acb630e067598ec495dc9e73531447363e88514277e02a8e388877a5568b1. 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/TR0011400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2b2917fadc9ffe2e20dee4ebd4fe5f96770d1291eaa2cc015ce5b870049f9. 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/TR0011400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0e7e5899f24db40686c224a2ab74299e870b6bd847d541741d136a0fc239e. 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/TR0011400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc5cea26ee7b921eb15f6e0b4847612009383c8e77b559474428d5014d9187e. 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/TR0011500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ac8474438fea12ce37675b3d018f2586f21d2f914c6f2405fddc0bc719d8c. 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/TR0011400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed349c2172ad6cd0c205ea06e52bc301daacd8ce53ca21393a1ff7d8b1a7cb5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR0011400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83378b86fe4a53dd1ae24b735e48f936764f4cda899bf30669efd0c8d3645b9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR0011400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8478a10038fdb2b52e2fb31a55f866181b9e684dfe6840500714b6d79370da. 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/TR0011400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219a4ca26d119db19d25d8f98957baf8eea2485baab2aef1600f3b1dcc46575. 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/TR0011400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23e9ff6d49607b8acfcf6833ffd266c9eab45d1b5d3314b14157a7c91d5e25. 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/TR0011400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd159b52f88dea7536de7c18c8a6751366b729f46dd31c569f31e9e1f429028b4. 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/TR0011300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b82066e873293f5daddb60a0fe55f0c660d205fb97e81fe52c4b83b51f4f85. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TR0011400224.
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 0xe93aa0fed73f8cfa363289fd035aa8db81f5012b850e5d16be2445c0a844ea0b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TR0011000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbeedf23a28e668c962c0cb7ed96c1c0076b8fd35069c4edef73081347a523a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TR0011400232.