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 0xc77b32c08ce10d02a4c4563c470425a0b72415c2aac0ff81db2b26e18c6a0f08. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a85c1506-2ab9-4a9d-a478-5b839c31b679.json and https://artists.proofprofile.net/proofs/artist/a85c1506-2ab9-4a9d-a478-5b839c31b679.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 0x0b2b1bec717d14a8210e5ab2f4050c19ec03fc67dc8f52f13c7b6163ccc191a2. 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/USA2B1900970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47cdace435626e1ed61162e681f9ce5b7aebdbc548319708da4b627e67de07. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2B1900971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c9d7dc847fadaa0e4a3cbe0f3d6e1620556fec277ec116e7a8eccd7b1889e1. 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/USA2B1900972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0edc427b1d99b8f288f50ad6f293054270b772251196b30c4f972167917a1d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2B1900973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c314d7a8810dfaf0e7d1fef48494ec77a4c24141ae7c665c87123a381bd57. 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/USA2B1900975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad5dc675a1c3ff66c1f49bdaf2cccc824a4795f274cab2243a3c9d2257dcd0a. 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/USA2B1900976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac2261200745d0f7bbe6e373bd33c8bef114d33809fceef47322d2a1c590c3. 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/USA2B1900977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a601f2fa13edb29c72e7d61393730f5c779bb0df18a500e1156d0d80a171f62. 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/GBG8Q1700483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c7880da10dcebaf7d96bc7e413d0b43632dff4b96a68b4ce0ef5870214137. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/GBQLP2200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af6ca0800032a81bf8674df2221f49812a697aeafefee54ad34387ed2d46e6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL3ZW2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914d1ca611e2a03672f483382e53b2024bec764fa4f996339a4af8c4e66f1a6. 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/NL3ZW2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2722edffb0ce38d8f64c4e3c38be405b0fbf1922a6ffa3a471d1d5b934b77288. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NL3ZW2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407d95927ca9f4aa5ea0cdfc7af0b875f02573f1c775c395a57e2c619c336fd. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NL3ZW2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3db28df3037b30329b09f465ebcf943ee27066f1c6329f68ad3bed4becca67. 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/NL3ZW2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd150d8195ad5b703b9251aa5f3806011d8ed9465029b64e5c82fbb589ce30a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NL3ZW2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347c94d32a4c54dc68b5977c775adf40aae0d568e14dc7449cd0ec9fc8a85ac. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NL3ZW2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2a8cb507ab456431d25776d3510ab448dfeb56a4ca85fa47f70a3cb21fbc5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NL3ZW2100052.
La ragazza Del 6 GiugnoLa ragazza Del 6 Giugno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4b064894bab559827d29f39ef8eb0cd0c47c746fb2d425c47af33df249a35. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NL3ZW2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd67cfeeffc642cb626ff0eaade570367c3ca4c3b18d0402608850c269cda27. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NL3ZW2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019a7833aa68b000c55dac1df44a619a5fa06f533dc246ed16fb00f9bfb0fbd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NL3ZW2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db69014c20f7f761a92376f6d3551aa76032a7fd48041aa86b755fabfbc0a3. 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/NL3ZW2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a0cf1aa88e2fe044ca142152c43688bfb5681b2de0de992fe9388f5a2e879. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NL3ZW2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e3f0ac0f4bc6facdb7688529c5813aa6a859dd65d2806b2cd6b257fb8d800f. 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/NL3ZW2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbe8a66b0d66604c5c22619a3cf20f306c9253d09047f56a5407ddc284668a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NL3ZW2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795818ad149d9816e14d650091f6b704c9eee895e9b505f66c6a6dda4d09a9e1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NL3ZW2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffeb24a83a0414eaa21d1eac11c3e4c17b24724207f3af96334de89b3358dcb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NL3ZW2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca0a90c0dba382187916146fad4d3b60a028f72437a8774f4bab1978292a1b5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NL3ZW2100063.