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 0xf4a340b500a9b2d4519e291518e4bd1ffbf81615771af2ddc3e23dce8549858f. 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/1f4f24ef-4839-417f-9006-5d8099f41976.json and https://artists.proofprofile.net/proofs/artist/1f4f24ef-4839-417f-9006-5d8099f41976.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 0xc6c22eb9675a3d20431e42ab853bf496a8f919dcbe98542c898538910978f114. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:26:12Z), 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/GXBDS2397819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c6ec3750a8fd416728db922e61aed91b2761d990e8f71e872ec71395310dc5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX5MY2343698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c6ec3750a8fd416728db922e61aed91b2761d990e8f71e872ec71395310dc5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX5MY2343698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cc5e23a08a4b064e002012a77ec8a8f68ce056a0a9728a5dbf5068f8227076. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:45Z), 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/QZVEM1860629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a26e26c85a93ad0b901893f95d4e01469f8d8de13cefccbe4f3f5bd90f6465f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:32Z), 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/QZES62472598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939dd3649b52cb442cd3cef66843456ae4c12c18336caf70f1f991d9e2859441. 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/QZPEW2589578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a20a2abd8a729e7da73239caa4ad569dc595b22e47b4bb890eec149c541772. 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/QZK6L2483594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720f861269e90a111291983c2444dd5b29130fa9f56daeb042b6e82dab3a2ae. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTB52441142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15963c69ae860f0dacac19eff349048f65bd60cae119ff2290dff511927dace. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:46Z), 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/QZWFU2447807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a89a80ffc4952e21ed812fba7ac0bf86a5b3a4ac59aa516868322fb70990b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFW2473781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687e579d53efb7830f461fa445ccbcc95d6e65dc5241ccf492f7ca9380c621b. 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/QZVEM1887636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf681e566768cdb3f6e4c7b5e292150c1ea22e961230186adb1b4ea2b2e889d. 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/QZPEW2549851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92ccb1b67a395544e4ba21c0a4a124544dc1d106f3119fadfa12f8d9efc259. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPEW2563134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a252fdc272686bff6897ad2ab4c12cf4454a646c7a702e9e47d24909b481f1f. 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/QZPEW2586762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569518842f3a72302fa15992f4bc124f216382050a34a2388ce4b37895d579a1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QT2VB2511003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3a6804f9b56c7aff9a1e399fb774529a5f0342d62d4fb00bbc5650b68c440. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNMT2563014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59603e817da8ba46ac1f85045acbec6bd4177a2b5e5c2a38526e9ede1c14ea. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:04Z), 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/QZNMW2554232.