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 0xdda4b5fb18257539fa7e87226ec8b6fead65599b2495471e2f0fb629c8704705. 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/26eecbe4-82b2-482a-a207-5166242e1fae.json and https://artists.proofprofile.net/proofs/artist/26eecbe4-82b2-482a-a207-5166242e1fae.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 0xeb7b7b5c1f6d5ad19736292126189c50b34916489532bd2e4e52171be5e0ed54. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYW2157094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a508de1554d62f6882574267b9086e6249120a45695c4dd239cfe00966afa. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZDA82163278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7d62c5cd3f9676f7556e9e91660a2b37408c7a1f31b360657865897015ae3f. 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/QZHNC2170093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dfff3066e303f5cf24165c7c68d54c098480b5a3d890c3c15a92673a0c0683. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92260095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec35f326da5710ea99952cc3b825e569a8914e6b64b805ad318c583fdc183152. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES92260096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0545e7f005bcced41a9b36ef72eebe40c59b0dbcd9b0c72b40d60012a1f21b03. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:38Z), 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/QZHNC2215742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c42a4ca21d3523d45c915d4b42479cbe378c778b34cc3519180ed7713f2cd92. 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/QZMER2248260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d318187cc4bd89b592d3318050cd590116cc8ab8e77f4280f375bc72f76410. 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/QZTB22370572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab973accbd9af901d5623a5eace684663d994c21811d805a9aa103b73e0f18. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX282477837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cffc958b87298b956275a07dc872c686d139ee7e762d2af2dd5678dea39845a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA052435219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d509fb97928824d34c7138ee2fb9f82eeccde4ff94d53980040ec0fa0a8f7d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:22Z), 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/QZTBA2522871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282f9decc9087f9860d95b1b56b84ef1c581642544b320e58bd28dc1b84abe1. 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/QZTBA2522874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd054ee6e2262f1356fad30d87f77083c1e6de24d71949a33188a93e0ede75457. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:15Z), 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/QZTBA2522875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dd07b22da36231394a61c0737ea2590bc81080bbb1f4b2fa4ddb641a38a7ee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBA2522876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f4c2b719fd7540025e94eca9a90893c93c924e3943078990350eb48a7005b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:09Z), 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/QZTBA2522877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc522dafe2db1cf649d33042efe8e03ae4100cd61959f6c9a958b9cee97a86788. 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/QZTBA2522878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388005fdc1ea7a9e280d2d205fa9578b9699217727343447653dbd6278d2751. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBA2522879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1050026c36087c0ca5332b1dbc78d9b3a2d6d86bbd73979d433457cf23a932f. 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/CNZ632300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf45755a9373e47b381007cce03c65022698ae67c6b7ad5a463409caa58ed6c4. 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/HKG732515177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db37dfd15f15a708d3b6eaf8874fb4934fd3406d11e21966414e43d1bf1999. 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/QZH6S1900808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57502358783550cfd9b4fd2a3fc4e28dc60256680c7b81c93f89c39e7d38e64c. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USUYG1384283.
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 0xca337ce105cb7ae5e7237755f869e958cf6fbefe742369593a4864ee90c89ef7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CNZ632300440.