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 0xd8d8485d4e1807c3141f529f713ca1803a465c688557873ab50ec8fbadaff338. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e506909f-8046-4e2e-9426-7c82f98b2026.json and https://artists.proofprofile.net/proofs/artist/e506909f-8046-4e2e-9426-7c82f98b2026.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 0x577560cef07d375303f8e78d8d7413b5c99b5c50a63d70002aeb77f827608b98. 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/USDY42061628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6323370b4fd884252c50b654d5fc7c0c53a467d5668082647eeb8e635450990. 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/USDY42061629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a3e3df6009d7593021e7ef8f6fc40d5076c520f146fc267ac0631c0e3925b. 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/USDY42061630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57066e2831a15563d3cbc44a395ce38d6420080275e315e45fbd02c38ef8fe60. 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/USDY42061631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc19706e80b53b45ba5496e6eb7d10534703f7b9da94e87d3581544d96829d52. 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/USDY42061632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe3948acf3161a1c94242c45467739fb673ca0d115ec2c4c8dcdf19d91e57f. 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/USDY42061633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc15865969f5b9b85032939cca08ae8852f3b08f0301ea02e422e8738043fb5e. 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/USDY42061635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714c0aae3ab6c85e48c675a82968f8217f2c77b50d71782b39e9fbb14be3b4a. 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/USDY42061636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554704c6494184a91bed2bb4c97c618c6957cbe15492d8f29c8e5c36d8d412d5. 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/USDY42061637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fba82459e1ff23d82f5e6fd0601f65be12dc3f8b9a876674379783ea2eda5d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USDY42061634.
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 0x66d33b31f6217e5f2bdfc32fcb95ad4ad764428c57ba516206131d84557441fe. 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/USCGH1776395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fb5eae21520aea9643dc4e9824fcf7a09c74d121bd1f2b86590498a3b487c3. 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/USCGH1776396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11984e09830b31fd85cbc51357b99c18fe7e7e91e2624b7b252b75a66bbb14bb. 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/USCGH1776398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce4cef16956b33fc3b9ddeec4b9f540261a6b3827486b7838756a02885a34b. 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/USCGH1776399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79f5d720470df0967fb0952e912ce1fe9237c6f38399403ede87313e07bb8d3. 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/USCGH1776394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23079d1f45c164042a5d4a3d2037305b2b27106d60514b8c0fe798fb02ae22e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGH1776397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c91c19073cb329c8a99715e6352d407908af42665e65c99bbcc1e805ebe2e5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGH1776400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b0897ac6eb38cc47202f7f4c4b6d705558bd2456443fdd0e982a2ab9df0c1d. 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/USCGH1776401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a17498d11b22185c16068fa008207ae9881e26c19c23bd127721b059046df5. 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/USCGJ1683086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b8c4380866ef0dbf6cb50a62341206142e893f75bd6ec57835acba20bc918f. 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/USCGJ1683087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa8b5af6f824138b1bc74b5a807152d3fe07eee06d12be91c42bc7861f32881. 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/USCGJ1683088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee92e62dfecc3dd6f150ff4a24c207c8264e3fb318f5afa7c0142f93dcd96c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:29:30Z), 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/USCGJ1683089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af64f728fdd35a01166472d3cc391c372a34c5c31a54c11a6971fc86ff7b276. 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/USCGJ1683091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4abc09a469dcb4004827b8aa8de05db3aecfa0defbe705113b0ae56293540e7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USCGJ1683084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345e48ea5dec81cca6c1713a5642084bce74909ec6b7d9ba0878e9adb5df32ae. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1683085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1efc18d88cdacf247a726ea70ab2d9a0ed72da68629e80aba1a0af7fd4f700. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USCGJ1683090.