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 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 0xe4c94fb32fb1f46d894ccf98f6bd2405dcbdac3b56d757e8852d0c8a04869753. 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/63655c61-8609-4209-b029-af564e46888c.json and https://artists.proofprofile.net/proofs/artist/63655c61-8609-4209-b029-af564e46888c.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 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 0x79bce27463123621904fc5123392ade18b0956953108007a0d061fa2ad5202c1. 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/QZNFJ2401938.
Dog Days Are Over - Extended Afro House Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464b288cad78bc719bdc42bd1e294870d1fb3d00ed7085cf31412dc1f3b68b0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/QZNFJ2408644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b67f10099a5214fae2d2da173812b34b2c83c4c4e983ea09faf48b701762252. 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/QZNFJ2404787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7900323228bfd1736d9cdb88906d7439a166edbe0a39c388319c339f231d434. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZNFJ2411405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce2f4604bee1be45a452b6bcf91b465bbe85855806732486af390b34018fd0a. 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/QZNFJ2410922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6205481d7db784860c0f0dfc44259b784302d5817ce3376b488f54066785e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNFJ2416055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f52519b278cb35b8e3273b36a66e3f434c1346d6774cc9647121ec63be88c6. 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/QZNFJ2415674.
Sexual Healing - Extended Afro House Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6b45074ee846f4238efc4c7a05678d6a0fba5127075c7c3cb5ba94c26bee35. 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/QZNFJ2415913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e1dd1a16e7d937734cbca1c7cea262761d69f3f61319c5b9753454a1d4c0e0. 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/QZNFJ2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfff00dadcd86d11b16edda462d4af446eb7ced91d582ac20c80b925fec19b6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT47X2500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609d31031438b370341dc4f7c712926d0f02c9bed501401ed4e68201d7eb0788. 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/QT47X2500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af853fcfef22786777a530809741efa482e676d963ea0a6a10b1464667ff3e. 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/QT47X2500998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7170e0969d093965904d22b53cf10d517540a5226057e947938e509a1018ba6b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT47X2501045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1ce0004fc7bd539edb2b2349a592f379cd22872e4f97d3b09f3dbeccf8a52. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QT47X2501047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ef5eede5ac75f021ea6e8495e32746f13dcf8137dd0a13106ce3fdfa01826. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT47X2501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f675a5a3dbb5185ddd4c0b2124685c8e440c2f6073790b741b6a3ebf84e03a2. 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/QZNFJ2403444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bce27463123621904fc5123392ade18b0956953108007a0d061fa2ad5202c1. 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/QZNFJ2401938.