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 0x198052938856e59315f110722be402837c9c09fd7c6cf4c2254f7fc9913021b4. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5beffe82-6b7a-4998-b64a-792aaba9940d.json and https://artists.proofprofile.net/proofs/artist/5beffe82-6b7a-4998-b64a-792aaba9940d.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 0x316edaac161302aae2cc734ccf8a364d6c60c0efa7aabd4fd925601e33fe8295. 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/TCAFM2172277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5898302d7389728911ebe1e5002e80dbf728e1ea44c8dcda8f7937b129f42ce. 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/TCAFN2126208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6938f00420f6aaede4131e769cfdc58d50ca4e69d15c91bab3b23df9e6df2c2. 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/TCAFN2126230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f36e7de1eb2b6968fc28177f512b93ff9585ad4c970ff682c428f82a77a89. 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/TCAFN2126239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb864be254790ac36c8b832fb45f9975364f82c750b2f0c6dda09c63449ebd756. 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/TCAFN2126257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a1c9c86287b4cb10abb7492688e7e985ed130d49767997749cc9aaeb8bfbf. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCAFN2126279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b735fbe65871feb740deb2bcfe75473b8e29e4c0095aba12c0521a52264d37. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAFN2126290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccc9a3b6a6bf7a59b651d533ff09a73e9d757aa5fd8bfcebd59a22a332f202e. 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/UKPLV1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b9ddc447f47d7ff206fac260cb817e0d0bdd4f6a6dedbe75cc24be652cb32e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAFN2126306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17143ae9f869d2c20513d2a5cc51c0d69d3d38cd966e99686c6b9b311a664b86. 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/TCAFI2151560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f5156a8fae233940151845cf070665f07bbe5bb15b9a7fbaaaaf6d5759de9. 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/UKPLV1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3ecb615856138f016bd2bf6bb59f7a69ac022708d3fca5129bcc10dde842f5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAGZ2314802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52b08c773477a8b553e3818063f0b85cc7c9573352783a8761712b4a2b79b2. 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/TCAHM2316073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c575e256ca2c896dbd0e0a3527ec2897fb043cff61824f21bef179fcc387ad. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GX53U2396455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4da33a07c4d6cb7a5df7bac6a2c470743af2a94829218db2b22547d677c7e. 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/GXF9Q2567146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c575e256ca2c896dbd0e0a3527ec2897fb043cff61824f21bef179fcc387ad. 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/GX53U2396455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e93761d63d184e3d73f3d2e3cf69cfaf165ab7204982d53538a4be1c9ad5f5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GX53U2586439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e93761d63d184e3d73f3d2e3cf69cfaf165ab7204982d53538a4be1c9ad5f5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GX53U2586439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4da33a07c4d6cb7a5df7bac6a2c470743af2a94829218db2b22547d677c7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXF9Q2567146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c575e256ca2c896dbd0e0a3527ec2897fb043cff61824f21bef179fcc387ad. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GX53U2396455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cce94e545b55012cb9e6256d37e0a31d9b21aabeea349741b9b8b74815ad11. 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/TCAFL2184125.