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 0xdcbdc4cae4910f14497b24fd38bb7b91d4b19af8fbf8c46c971897252921ff17. 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/a3728be3-9c55-4183-9357-972173abd88e.json and https://artists.proofprofile.net/proofs/artist/a3728be3-9c55-4183-9357-972173abd88e.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 0xba793eb8f8d95779635bfa3937fd57de162763a8f36ecdb1831ce6c40c20f1dc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM7G91614571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c42c409037236958ed40b3ac28d71268fe2d32555506cd770811af1a71199. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US66W1800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9900e3ce498af296a83a804c05b67f7c9ad1831623329161799405e53fd313. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM7G91615421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc951db1646eec0acc07094fdac77cf537507a06d890be6d8ded58ee2467d184. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7G91614422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc37b09a341e91a53f21d37a3c0077ff59b471df4d97c0d0d627406f6abf7ee. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:31:35Z), 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/QM7G91614577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2577c772dc885bd4d119190c04a71d7d25038e6c4f4c8d4c1808e902b1f249dc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:04Z), 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/QM7G91614740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd55830fb706a9978f3f8275b26072128fe89f6be5d42466bc20ea530b47f740. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QM7G91614394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b09163c3a44af1967a9673bf2222295e1017010c1d8ca690bf7b2ac59493a6. 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/US66W1900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9511200d79ba78b9b951dc78cc2aea3cdac29084807d99f5c3d7a967ed38a214. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US66W1900477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9c46d4bdb41e75487edc41d365dfaf7a9ec56160e54193e78d08f2cd300e2e. 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/US66W1900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbf684bb8190026338aa951121bd42fdf44499458f4c9aee995dfaacfe6645. 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/US66W1900482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f0e1248ac8a1a59018cc420299aa79d38acbfeab9c9c8158e6e61471276321. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/US66W1900479.
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 0x9739ef8b445cd9026479db30f48dc1116712bf6c59d3b78e01770850101b7e8e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US66W1900483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e983de0586355a39538ea0b12fd06a3f014946bec69086d9f121c9107bc2c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/US66W1900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b380ed4da3fb69362e5bf3d7f2571acd412d31be1b35345ef759018c840393f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QM7G92000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2e5c6c0a3e9317ba54cb48983dfb9cb6b722080daeefb3dad857401da0a798. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM7G92000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251c66b45ffb45a0c06d947fc1973b24ade18a80200d39542b42413552726fe6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US66W2200798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49d87d32422a6fd893dd3f1e13b0c9cceee6367e053934760bd8fd626fa9c26. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7G92000163.