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 0x0d5fa02fef10ea8c0b505c3cd3b7a796865fbfc244333d6f9055a0ee7d5fd795. 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/f0f5f2d9-72b7-4eba-ad1c-d6a28e61db9c.json and https://artists.proofprofile.net/proofs/artist/f0f5f2d9-72b7-4eba-ad1c-d6a28e61db9c.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 0x6e4347b8c559116be145d1ec775a1acdf63933ac39c31539adc543c5a78efa91. 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/GBKQU2446313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ceb14aa664f7b23e28fc6c7692968de7fa65d84fd4fb43c79fa36db8e1498. 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/ITA061302238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccb2803ef5672b124c8eeb537e470b35cc3f15d843e1f8bcbddc56ffe3432a. 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/ITA061302240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ddd4dff52a3749dc69e5c0a77a987193c7e2ee51302711a37df7c3f3199fd2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITA061302242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc976bc99c0151d08db094e50a6983166de73011f2399661c966dbe2e994e43e4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITBHZ1500999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce904c4b7fd300ed8c6fe8efbaef3af54d24805509d53f0645301c21720ebe7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITBHZ1501000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1709340a1b81803247a6667b688b7a5ede14e41e4e06c308005c3d8da8db8e. 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/ITBHZ1501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903fb9bfe0e45099d27628c1db44780fd59e2fa358f0bb69fd01e3c71528e9d7. 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/ITBHZ1500991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1503adc7d848575531f1a1e8fc3cd9c41291e1e3a19f0906b93c1d0261721aea. 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/ITBHZ1500992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8373c7b1580d9503b039cb2358d9a5610a9c07d87cf05bd8b1a90e4f94d1085. 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/ITBHZ1500993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ca060b0a11079a87e351a52fa0daa280d4accc922cb90f92aef957f1f1f90. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBJX32360016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d4fc1cd78cfef8d81e3a53540f6a00b68ec9900dc809430c159487d247ea8b. 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/GBJX32360017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb821989fda63491eb0abd50b202d84706f6c1540bb8923f0f7a1243390f383. 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/GBKQU2370667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392ad23279beaa43f954dd1d2fc6d8b3206cf0b8ab5b3246c9d92d4d608783a. 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/ITA061302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853662783ad67703b39ba930b2b6f01840972966d108c4e508692ed9c2413df8. 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/GBKQU2344686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4595fea258469872f6dfc66be7b53f4927e7c6e8a4372be1e8159ae37d271404. 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/GBKQU2344687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c5fa9e6df711b7b574a0ad033d7ad0b2b942e47b267abb2737ff397d640345. 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/ITBHZ1500864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c55fcf0e67a45818796ae9f2a1a7ab4fef4a00f7314fe742895dcf21c1305f. 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/ITBHZ1500865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c7105785bcf8cd2f752a2492d37719acdcc90df8298808da213a4a5587334. 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/GBKQU2270399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3e86dccfdc4e917228e050d2dcb5ec728259d95104133d9d31a70402ac59b. 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/GBKQU2270400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708b9976a1a88aad156c768562dcc35c02b157f9c5e9e90ea0f97b1e31b59bb. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBKQU2270401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09557ef1214ea357d879ceafa060956235799be3fda3a8deee5c707f9d12eb6d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ITBHZ1500787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe735759bc40962dfb4de746218fc8eb51ae8d1fd456e011fa7f82cf295877797. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITBHZ1500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdafbc3fa65e5d5c7c4f005bd536de223a64ca40aaa99204da2e170295b464b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBJAJ2102281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa764ba4050768f7d34df73daf0133d79fb00e3ca80e3e1f92c98ad0a66b9a52f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBJAJ2102285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7943b8144b8fde8d4f29e251085b7e48fc2dfcab2891aa00b4c97c21cc0e881. 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/GBKQU2143318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd96fde0b8b53e271ed5df88583d16d7980b7304f81e2c7bbc2549427f64d1f. 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/ITA061301975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9917485eeda350cd13093ffbee2b0e0c9658e4546b6a151e4c4550d4df17d99f. 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/ITA061301976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4221053df982f1122fea8e0fecdb47bb5d15b80599b5b5ea1cc520a7cc96ba09. 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/ITA061301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc1b8dc8d1f9e7ba9e8a9b8c2e9151fad63c51622da89f3799842b7013510e5. 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/ITA061301978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef83f026a06e80a76a31b3c8376b1d092f9eff645b61fcbd1a7286fe8b6ebc6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES7842028539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a682e79c10ccc71f0822340ae2b5ad49ad7f93ec1011a78d0f0000408aeec. 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/ES94G1918303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47b0ca4d6b6801e521e4ea7d45b660bdeb34d7ca42bfa231cca5f47e8b3e2b. 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/ES94G1918304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b87ae71355379c5e5a5215fdd06b0d0f6620022193df9b1586ede552fb7300a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2042178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be10bb78f440804fb67906434461dffdcaf052a9d5038a1b30aea921ad1a05. 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/GBKQU2042179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8a95378825b64c2c6c3e4a34f88a678ccc8cc858aed749b135dc5bfdd5ab97. 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/GBKQU1980396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c450ca9301a039e27cf4491e3466deff04fb4d033716668a05d1ad3d63be0. 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/GBKQU1980397.