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 0x06a7f80c0773e3cece04958a125cd81b1ac8a919ea6ee20dbae627efd623ad3c. 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/d623c93e-ca66-4731-9a50-105732a1c40a.json and https://artists.proofprofile.net/proofs/artist/d623c93e-ca66-4731-9a50-105732a1c40a.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 0xc23d339cb6592c3f373bc1e101dff62d17009728cee5ed76ded4b34a9b88fd51. 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/TCACU1683839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a156d689d81afbd76c914d0bcba1ffdc31e4a6954d4c9a9080e3e133bb408f. 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/TCACU1683840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea98f66462f916ba9804daf19aed1cb0a74d7738cd0f5ebca38c575c9478285. 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/TCACU1683841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af9fb172e8e6313bbc499ba78727f4257a6c3a2993714ef8c1d6b9d4abda6e. 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/TCACU1683846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1091cdce82710a3b4e59d1ef3c3345f06d4c878ea83dfbc341dcbcb7a3cafb. 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/TCACU1683850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7f2c171fe1228b8ba2487add8694881bce8ed5880878e09064c71b6e33e4b. 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/TCACU1683851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495f9bb2fd3b063235baf724f3b5698e5702e1b600e7858edc50ab617baf073f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCACU1683853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04dbf1b2b16e72beca6d0544c3bfa0407401a8766fbefca5fc476404a96010e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCACU1683858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e8b2b69cebf952490a2a6ce778a345f43c59bba4afbd10d64be27fb67d4bf. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCACU1683842.
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 0xa68c193fb454f24f953d4e637cae289a5704e53ccde17a2484d760a1454ef435. 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/TCACU1683845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db4858cc2e1ca67e8ec512ce01c8eb4302f5421b72e7f426549f4c5ceb15008. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TCACU1683848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0759a0b82d8b6585d6a7919e56fd39f02ec3dfec99afe715201ceae7cd2dcfd4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCACU1683854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c31b37cabd8e5b517654f03939cc79eb91e533ca4516a6d5fef5d739f06f29. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCACU1683856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508bf504bac57a135042488484582c03a7186373401c7624031f08641364c15b. 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/USDTR1310101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca400e82f0c8993da07edaccecf7addfbea6764bdd894aafce101a19e752cad2. 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/USDTR1310103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5eedc204ae5f589b79790ec9aafa72d483cee75dd17f78aec029763d2de12a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USDTR1310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04519b28f9c069296f6605455e1641749ecdc27b74a2ac09a7e1a8ad0e8078a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:08:01Z), 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/USDTR1310106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45acf5e504f830f7ac2ab1432a00cffe435a4720831aa3af46edb4e460adc496. 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/USDTR1310107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3497b3c35ad319c65e1cee4bb5787d8e3e6150390745fe2c51e3a5a2aecc86. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDTR1310108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395ffb1cceb1a9da3b9723cab08af9107b412b9de94d7dcf4c0aa669be26a59a. 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/USDTR1310109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bde6a26419bc3d4cbe3e9e7b2d05e7a1bf3f3bb0e86216e67344031a96d6fe. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/USDTR1310105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ce61bb03252771c2cdd4998e00e8b903e93effa4b2e14228481b780358d9fd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDTR1310102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ba7f0fe521cd1154235cb8ec0cedfc5e91216b8a116e5c95b96be79d922ea. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDTR1310110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107e1ff044fdfce6956fe8c1d8a1b9b62595a034ad92cfdb4cf7f2a50f427fc2. 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/TCACP1635728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8c3a8cf254c956d3fb14d861161fbafc1df7432a8b14cefbe60d0057bf912. 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/TCACM1681826.