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 0x6f61ffca9ae49ea947da03cd8bef8e05f2e7bdba6efdd466bae38372e5a25686. 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/35b663f0-59bb-40b5-806a-ef94d9cd2e97.json and https://artists.proofprofile.net/proofs/artist/35b663f0-59bb-40b5-806a-ef94d9cd2e97.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 0x34fd16e4b21f0cf701d28d5975e55b50fda4a8320e153803b40251b53335aedd. 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/USA2P2206784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85706238cea250926d1e2e4a7fdab2a3438f736a226160663cd96ba01746543f. 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/USA2P2152073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2609e3b9657c039337ca5e9b04a1f9348649f779adebed0c467f050060277740. 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/CA5KR2400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ea273dc2176f636f0c76ffc79ef1d27cf34873a8d03e425a73da70c3b2e46. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2412635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2609e3b9657c039337ca5e9b04a1f9348649f779adebed0c467f050060277740. 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/CA5KR2400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4123f50dd29647925d7fce0b32c034721bcf10a008fd6a15eed701ac35df4. 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/CA5KR2417280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef8d2227d8a17cecb706840baa7693ffbc7c086f9cdcb111fac6383d0171124. 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/CA5KR2307672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17579c22f57b7eeaee04c63afc1446d010250e2563dbfb442ab7730cc2f16c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2307675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5adf072404366d819de9a12dc2f9f34a6e4bad98ed6f6b9c56131f650cfb3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2307678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe338eeefb6d158ce077a8863e8cb698ef86645f53f4f311bae2933569a6cf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2307679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18b8072162c3c255ff1bfa90350748fac506f210ab030f4e408e5f0652d294a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2307680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815bcd805fc6a347fd9d53e2e87a0f9f70e8a343c88c40612f83abfb5dbdb2bd. 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/USA2P2155974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005c9abb631ba2b8250488ed39d87d56ab80c8516afc8a5717d80658fc72a50e. 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/USA2P2155982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c8a2ac7a18fc6cb8a0f512ddc02a8d307328c42690aebc74bf8c70c4b23d4. 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/USA2P2155979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85706238cea250926d1e2e4a7fdab2a3438f736a226160663cd96ba01746543f. 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/USA2P2152073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae1ed95d6b40be5fcc652a088b3e45fd5f8ed6c2eb21cb2f09b5b35108be2a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2155973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20f49f0ed6a2793a44f8c0332e6bd705bf5c4c1fa97dd4bacad5a40c92d981a. 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/USA2P2155972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfde26487d4a4421ad68a15f03b42ce663f5fb2bf7f57a8e2f793f4baf2cb1d. 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/USA2P2155978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64418b236ff0b04f3056ccb0b449bc72650582e16b3a245fa4dc09c3568331f7. 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/CA5KR2466040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36090c0864cbff36d57e44a900b744740e14bd9c330b86ecfa5891a184a2232. 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/CA5KR2293593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cffd8ed148301b98d09ade94624886f7c9c1fcf2f7de36d2ab9b33d0afefcd9. 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/CA5KR2293596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3bb049a9d6ae2a0710f890cc203e36e9b957287b1697cd417191596f0a26fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2264804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a60dee5614ce13e75772d6041d9fff8d37de45c49ef1e8b7c98ad339c10dd7. 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/CA5KR2264805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b71da401ba061d8393fb4787576cb2a40877be1e5725262e31fb57a7bd695e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2264806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aeecfee1692febb51193b2430a929e634f77e6adba6c0fde4d3e31307d4acc. 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/CA5KR2264807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c38fba3f4c302c3f8ab995f3f129650df6f25f4db9d6a0f166db701b4f019. 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/CA5KR2264808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cfe891ea846d661096ee2d11d6f13650aaf19cc2ca877876ae4a4bab0019af. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2264809.