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 0xcdb2d220c2c57f66454081cf6c6b12d748cc97df73b78936b6d08ef4bb78996a. 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/cac0980e-7f7c-43d7-aef0-a26af25329bf.json and https://artists.proofprofile.net/proofs/artist/cac0980e-7f7c-43d7-aef0-a26af25329bf.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 0x58e2d13c053148493a24e3b2833a72556fb4c45291f50859823f38653baa260c. 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/QZES62540148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124f6959ac583c0c0f2d571ef3dfd1dad57d27ee24f06d24d75452a0b291328. 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/QZES62540149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992dd7b93e716c2eb1f63f28e1fda086375540b638489177668647b0905f083b. 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/QZES62540150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ff16e66e9dbd10df6dfaab9d4c24f89011b237ef94946847d7137cfaa4e512. 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/QZES62540151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877eff741c20594c3ac3bfed9f055bec1b8285cfdd501d9a53fb3b22dd0bf0e0. 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/QZES62540152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a7e6335ca7e9938bb86764f00cd0bfa306a159e4c01b31462592fa6c86ca6. 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/QZES62540153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffba0e2b7184af3d76a24a7ae1dcad451fdb5e66814d5a896fda442f22f5375f. 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/QZES62540154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645215eb0d4d4c5bd797c304edb4756ffd4a3e29d2c9c47be48898cfbe72a227. 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/QZES62540156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62803a51692a0a38f01e740a49b35585d0833a4a07d5caada0dcf5ac98d60d. 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/QZES62540157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e1633050c7d8d0f6975e63fd1797236120fc49438fdb303738be6cfcd9e19. 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/QZES62540158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c55eb90378a7e48078f0e73428164c0b6810def3e6c98b43223defe18c00a6. 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/QZES62540159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4b4e5ad62c6caedd5cb48c9fb219d07ed1698cea611457bce53036d04d688. 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/QZES62540160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32857810c8c7b4019b5ed1b450034add9a49ca2d0e98058c49e73994dd4c88c. 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/QZES62540161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76dd24ed668ba7507efe047a3a141beb3736f9ed72d53a180015413995d85b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES62540162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4745da3f68bf5b7767b26b584709c418a9bcc11d8c5f25a47b90af4b3173b58. 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/QZES62540163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de135d3d424e6dcbb7670eda2e8b11106f77636fb38fd4760913d15dfe2e43. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZES62540164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd3eb5a9121bc6c6c4b034ba75425803cb34fa9e443b0eb970ea659c415620. 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/QZES62540166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5610d6e75bceb6521c623198ddfda046bcf8011a37370dfcd59f0af837cde. 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/QZES62540167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92249306afaa2892b11f5dfb0f917c5eca5b2c75484239b9cb53f84c564938. 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/QZES62540168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4088464ceb6a14b4d8c3e16e2d2bfa592c09f5f496920aeb9cdab17f477c2d91. 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/QZES62540165.
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