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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 0x2fd0c62de0a75f107577f33d3440d72107c7568377a9ccb5081b1ed08d639faf. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d57eae89-3427-4ff7-94cb-7c5bc9bce62d.json and https://artists.proofprofile.net/proofs/artist/d57eae89-3427-4ff7-94cb-7c5bc9bce62d.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 0x13a7de6cc200e7817e84cda49975a54522b8d94fbde2aad8ac900c2a9ee7b6fe. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:42Z), 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/QZCE61848726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ed81344ac66d85509bc442d30b25450b4ba6367681d006e1b58fd91376682. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZB4J1867367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0517c24d15b5b18ee5304e1ed56561eb7184461a2e523fa5159db871795102. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZB4J1866449.
Nighttime Serenade (Waterbucket Beattape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe610f039afe390a40be0d5472ff5da7b8884bb03cdc1e54e0e74996ed4f99f9f. 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/QZES81913766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe294f7d7a9f18dc4591ec471a9f3a6f398fa446868cc825bc89b9b127794ef3a. 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/QZES81913771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3254d5b14e956e88b42e729a87b037bca3c10f69687a534649263ae53f6e8b9. 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/QZES81913774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4923a7cf34cb945467fe60c614d0f5610867576549daebc408bdbb28245b23dd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES81913769.
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 0x2d04e49f85a25aed0f867a77add0271f59266567021737a1d6bdeb5ba406b116. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ1918362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379d9aa43e1ebcc959dc07ede730562e4e2cde6801673c79b8406b175b71ed09. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ22109340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f839a5deded5d7bee163fc52526134f9b30c4ce244b67647be13c37f18d8722. 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/QZHNB2437202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e9f8e27cdc1e2c632066416df044017bdfa8e75b250614dbe320c5588c2342. 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/QZHNB2437204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b9465487ed0700602b428656e19b83c8c57b6d46dae2bb3701c73a0f79301. 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/QZHNB2437209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58da2270c7885177eb0cedd1a3ae024397be7f329176cccde1bcde2f4eec6f08. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHNB2437201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3197e111a65275c91eaee4209a84a109d578ec6210477dd1ab88f5a29bb6af. 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/QZHNB2437203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f667c517470063fb905b9948737794a632e8163746ec41e51de3908fec4e386. 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/QZHNB2437205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3535bff932773476c1dc0f34a92add7ea9fdd153b8fe2b03956bc89c969c2988. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHNB2437206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf8cd9b99e3eeb1dfe1a5fb681e407ae55c1f7dd841de1f05d3a9430478e1f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHNB2437207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67fcfd20aa8ff7faacce1c84473ff3fb02faf009f51b5d818276245c44feed2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHNB2437208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c3d3e11e21856c1a3eec650d9e77fef727c3019b093ab65f98d262bc375d5f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHNB2437210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18527cb989675ad1f57e81bc2d541457bdf97dfafde88606f9778c130734b30b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHNB2437211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69751cbcc370da0ee72959a8301defc46f84cf926e061b52d3cf6824f4e1febd. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZHNB2437212.