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 0x04c5a87b76d58fe34bd66e83d8c99081a7cf4192a861bbc9df3c6d92d1f0be81. 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/0b23ecf4-bd11-4fbc-bf33-e2930b142d6f.json and https://artists.proofprofile.net/proofs/artist/0b23ecf4-bd11-4fbc-bf33-e2930b142d6f.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 0x6c85563d31a5079cf60eede0ca9c6e6b22ece0043584c85cc057e918566e2ff6. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWZ2118466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a2c66ed45e7fb5c631bf3ea99013760f76e87050472a5e05d3ad70670faaa. 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/QZES72485427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6888576b77d5e4a61145c4a59d787a4e0b956560f2d158488f0a6bcc7e2a79. 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/QZES72485428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961783ac8c2c797d4002f8412492221ed8ad080f149ba56144936fd5eab5455. 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/QZES72485432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04d150b3b909f9e3d6658639fa19bfa81ad8a11364e9ddf467874775aec14b4. 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/QZES72485433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8092b87fd78a9bec118d4bf3b35435cfda298ea04dec5ce6aa2c84711c3a189. 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/QZES72485437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151a4b0df9bb4f6bbb6aed1c154da2888fe6a2f61949630e5279b47cb18482f. 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/QZES72485439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f0cfcd1a2583e2ef78a73a902170e093e673a05cf63ef091f2d9e093146268. 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/QZES72485442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe516587f16d353764fb99351bb3ee4e6594a13dbe2123d9b810fc466d0b61575. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZES72485443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5deac0c4769e23d0b1f82ebcf3d211f273f3e3ed214980c2d0e726fe6693fbd. 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/QZES72485444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aded2f448ee0eb7aacd64080ba1c1eb7d079b524d10f74a6236ac9b075dbbe1. 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/QZES72485446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a19ae52102fabfa0040e143a67495d6f9157d691314c13447457208803d214. 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/QZES72485448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e7834fb651efe783dc80e48259c886d6d381312fe932958f91c4ff4615843. 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/QZES72485450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003688bd786d2f9e023f5661fb3c9633fbc1ab661ec6f979655328300e4bbb7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES72485452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44811bad890c942aef9ca200a09b6c2dbfb893d8b7e72be662815f97df4af51. 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/QZES72485453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82a39cc85944e22052cf3160d8831c0edb9b4b8e50b79b8617a5d9c4c19ad3. 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/QZES72485454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625c05ef293760ba73fefcf823a3a9e7ba3447634be228df71382f83f6e7789. 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/QZES72485429.
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 0x029a56e542521d31e95d5971cc3f96361e1ddb1368af391ac2dca4d4524cbf48. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZES72485430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2330f2afe2e2bb212570478ff0404b64afc298a95e019a6ef8a48d3a9b15e569. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES72485431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a2c734b8a3a743b45b1c0bdb39cda0cc5495cd0413ec674f61c665f20aad8b. 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/QZES72485434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a991aa1ef0d2e32e5e81819a18efe570a53cc70a97480cf2524886b7d794a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZES72485435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a823993627f9d0997678e8e63856c8e6fa289461a901d520104e09469b1a69e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZES72485436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8d3c72fafdb8e80c2a18ca21d23e66489102f3b437dea08be013fc575ff8f1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES72485438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58890a8203b46bd98881d96859b1dcf5db0e0b29760785ea363b24a5c8526a1a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZES72485440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a56ee4de6ced8b028958abf3d037186534087ff768a29e338c36dc758f59352. 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/QZES72485441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7114701c4b69601b598ce18b1d2dd2387a9eccc94c6118d4cfce1ed3cb3bdb15. 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/QZES72485445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b060092ae2139a80c84432966fe309e67a6ce019c103022f803a2a9f8959dd9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZES72485447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c35365e2dd96f48fe9d9a749a50fd46c6b4f3de3322d0a7ea15d7f34554b6c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES72485449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b73e6e1391f66eb303225c12a791e8ee956818eae8c7b93e012e05d86b1cd2. 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/QZES72485451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d6787c4456f2011ab45d7d35f86a0a905f60e0ba2e5eb74b7ecb5e87c54fc2. 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/BEEJ12200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4517bbeb2c7cf6a88e546f271b717d0e422b919c4525ae0cffe1f41703c6118e. 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/BEEJ11900017.