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 0x39f22d4fc8fe3046f0303fd936206ed964c0a6b0c52bcd669db8db386e461eed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/266f2467-cdc1-4dde-b2b6-5243e631d691.json and https://artists.proofprofile.net/proofs/artist/266f2467-cdc1-4dde-b2b6-5243e631d691.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 0x0faa49abd1659bd6c8d59447b26f7812922560230e736d22c747d7c78d412913. 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/ZZOPM2221915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd103e9729cdbadc6bc6a57e5f1a0626050a9cc55989c45e86bedfafd8c71c. 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/BK4DA2319167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b70432b0c1da6a82948e58d692259334bac0837ef609dfcb472332786d0399. 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/BK4DA2307950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413d62ed8244061452d35b252280d4cb14d0bfc2315ade40fbf220a7c23f15ba. 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/BK4DA2305345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b633d057a038332bbe444389e53f2bbb9d94bb9d619b4695647366fe9bbc2d. 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/BK4DA2301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61592102550fd45cd6c7b22596520435af175469f7ec14f014327981073d70ad. 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/ZZOPM2239666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452b1d2b7f24d3dfc3b16bb2995a5236128513b43f8455e0261bc529cd4c565f. 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/ZZOPM2236409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1a1ee1ddfe1e1924e7ddc6ab6bb016a7c6b620f663fa35d870d00232f2a61. 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/ZZOPM2231590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ddf1766d1accacea6ad205c72c97fcae32905bfc3936048ced4adacb8adc4. 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/ZZOPM2231589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb183f355983ad750407d3d3cb35d411de10a3fba8dc6cab611572cff2f6c9e1. 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/ZZOPM2230743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0ed3b2a6aae07cc4b0cf4b550e8a81db5e0a78cbac41ef542d0734e7a753f. 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/ZZOPM2117553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9d86d6f02f0c5095be2687621c973802a9689c62468d552688843a5d822d5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2150216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8003cf7b328ccff20220ce996cbe2b9dd6bdf9abfb6f82913d135c5f3a44d31. 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/QMFME2171347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ea77bee84c14b6254a6c50fea5c9cb056458a130bbcbbd373075ea464d8de1. 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/QZK6P2118919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702a630af7231d0e01d9a50cb8f2a1bbf028b2be14a102c78630858add7227b1. 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/QZES82151396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab961b0e5b8edf7a7ca08f5608988d5aeabdac7d47da00fe89d6757f95665a5. 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/QZDA42189563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a51b3519fcde98edeeaaf9c2e3e3199322b96fb59219f753e5aa7b63ab153db. 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/QZDA42156911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2e3bfa96acf1802ab97bd37fca32f8eb76050e8c7433b35764f7c46e107c1. 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/BK4DA2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde621ad311bad1f5765504dc3437d98764e1a48650d60f91a40e37063eb8d981. 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/BK4DA2413158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04efdcbd83f13b99576114b636006fb60bdd8e0b4ceb69d75aad33b643fdebc. 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/BK4DA2408647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2e3bfa96acf1802ab97bd37fca32f8eb76050e8c7433b35764f7c46e107c1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BK4DA2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47861976a283015ae232433314ed448eb65d75a282739ef303777451a0fb0259. 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/BK4DA2400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698e0ac8ce1e53d5df70638f99e76b4f1d0f42f88fe9b76f2df1512a11bf7bb. 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/BK4DA2406442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b0be89f301ed2b93bf674cfa8c5a2e829aba4c00468b8e8ebfc562947dac42. 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/BK4DA2406443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5465f97be3a6a714ef998684ca4bc4010e97432ecc01e841c40cd8ff9e99a2. 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/BK4DA2406444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47861976a283015ae232433314ed448eb65d75a282739ef303777451a0fb0259. 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/BK4DA2400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f4ef97f6230a8f6745fa0eba4c3283109f0346d819d9a4a2ad3cbe2eb1a11a. 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/ES71G2208069.