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 0x0f7d57e5f37dc37ec513ab5ffa7254f01ff9d9fb495826c0d59cc6c7b74adada. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ba78806-4c6c-4a62-ad06-932a1b576145.json and https://artists.proofprofile.net/proofs/artist/1ba78806-4c6c-4a62-ad06-932a1b576145.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 0x45372617fcdf2f708bcadb60ddca5ad8e47f14234300d94b12876c7da84325f5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:04:15Z), 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/QZDA72144388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45adb4a110b4ae4380d86706151d6faa6d31c7343846185db88e55279c8ecae. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA72151558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af0ec437236cd412b8ff8e4d23b0cd053f9f991c4f64a500a46dcfa3a4b1ae2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAW2283328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbcaf729486a3f8816b385cc1e5525561203b6e0ab13855ffaba094b988c344. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:12Z), 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/QZWFM2450206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b88280429670564e2eec520a23637c5cf6bd612a752f0278a7e9881d0a3271. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFM2476980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d52d0545d2d4f483dbadfa37a975a629dda99f23b9a81f01c41127d0754db. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:04Z), 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/QZWFS2485086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036801cea456bd23654e6e67766090ca2fa3697ac3f3887bb3e56f752e62a69. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFS2497577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1e80fec246756991ce4a677263b351dd2a9c11e63c8daa3499a3eec7f6ca25. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA82589932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a51a3c1f68a8240b6c6cec612f7f3504207e2107bfc6f18b753dedb35a25672. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZDA82591327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf563c5345744feffd59db0dcc7cd7db42deaf036c0d9dacba698c8104c28180. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES52532512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88903cc70065f01f0dbd582b9e158bf2e0f4bdca6ed4ce0e4b46907d51f2ca1d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZDA82588075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dacc522ac8acfe505df1c5d1068e422aa1619155a6b920b680ed7e8cf32d0a0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA82596704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f18465ac7852f9a60c774eb5eb60c3bb6762c86076db81648c8b308a2a6aea1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES52529978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1889ae97b16595ad1adf6de21bf1e45004b76ddf0157fac6fe3823620a47c46. 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/QZHN82568113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e50da10c068212f65ab1dbc68a7ad1bd38a4ce276c46c5f96e9023374af6c17. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82568114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e14f30a5f4e7492268171a96f17f1cfc4474bd359fd8db0b93d37b44720f0. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZMEQ2516953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3df528a26e175d002dd342f9fbe3b81c8ad4897c3396bf79c10b892a0c67e9. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAS2538096.