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 0x182559fe4e4bfeb33e6024737bede9b7a855885ee3fe5d0a4ce5a11744df0b3b. 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/ecf0e01a-6c7e-44db-8895-902ba50d3c4c.json and https://artists.proofprofile.net/proofs/artist/ecf0e01a-6c7e-44db-8895-902ba50d3c4c.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 0xdcb21a09e1e4a7020b672d4b74575ba8df0d2dd47aa56c2fa593b56df3a97611. 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/USL4R2167673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d153447b444153e9eac82f01579a94355aaad32d16b62ff97cb377d78cb9d. 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/NLRD52024488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfe1fffe004314cdb1d455b429716482bbbdba6dac782e13c1f00dbdc8344a2. 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/USA2P2457695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65dae915b6c71dab7e4bd40b6dd55f0a49d58a7e4b52d6060a11d841487d7c. 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/QZNJY2480733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417a2796ffd4917b498c4ad180ef5e923d2df809072262092cbd382ba58f00c9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJY2480734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f53c58490fcf7dd8b11da0d7a46d6d58c849e941612df138574e85f885efa. 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/QZNJY2480735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d8c002f19e2f03edca521ca5bd8cce363a8f2613a74888a2fc0945ce62970. 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/QZNJY2480736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adf8fd84b5c079ab03a2123a594bde74a6cdf0a19a52d8d41108478be2cea6c. 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/QZNJY2480737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28b8c4956862e4a8e7ad07c0d3f6301e9fd1bcf678007cb2047e551ab7dc8b9. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZNJX2484839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619787c3fb7b4ca7239bc0e1d5a8421d7f90bd49573446bf599b269d118eb66. 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/QZGLS2456273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd10a6f23b4cf887efadb79182a33969a0d129aea8bb1fcf785f653bec7c5cd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US7VG2409225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac545cb4cca5da24da4d0ef4489d6dbc7cf558c5acd159ebb8cb1bc199dc5040. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US7VG2409227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96636cffd8ada6329f9dd78fc16f134da064ce11ada9bdea883a351ceb826552. 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/QZW9K2325760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057ad75b82c2ce89261084a512700b7bb02a79da26c6603bc51ce93567cd236f. 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/QMFMF2336975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd7034f7386fccac2a4e9097c43f3b5149e17ab605ea83d10f1ab18444a0b9. 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/QZW9K2311031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559eca63ce58ee11be9a7c130a19b626ef4c338485bc1d6829ec4229da2d80c. 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/TCAHN2312430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138817acaabca25d743aebc83b5fafc69dec0e4063371c6f5a19f953e966cbbf. 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/UKXN22317393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9b40e1d54e38acdd2ad08c68794f53f75f995abe2fecc6797c3288bb9ebd3d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNJY2321130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa240240269e20b6bfd982aecabf93c771956a8991684414e035bfc1d08608. 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/ES75E2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f679849d5302771b7b1006803125c9dd17125f90fc45184ce59adadb4ec0fa7. 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/QZNJV2362518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f599e273b5a814911b097ea33f54d2c2f94774039ff8cd0120bf45ee01572c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBWUL2040275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e010ed6cc6052eec6e2ec30a63e7082c8a54f16626ea52e2599842a19ca5b58. 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/GBWUL2029640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ace1b63c8c9ab1bbc1aa911e05a5b7e2ff27dd2eed0890f65bfd9184b9724. 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/BK4DA2401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb84002cd2041d38d4b0680fc0945ca18287fcf2d34c953961bee8d07e908bf. 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/QMDA62346545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5bc658883744aee43347f8b756a05d0e08ac240ea4e87ea99bd3d00afc148. 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/QZTRX2409310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb1a151ce084a609cd84d80122541f2ce5119ec45478fe39a99cd9b2baa0d6b. 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/QM6N22152179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5c9d79389a17d2d31f0c3814feaaf5ddd0b44fe5d405d21a729ef1b97a087. 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/NLBG31801170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059a5faa3697a1ef7a15b98d35f01fb680b86cfd5e0fd6c85451a3dcf4936e0. 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/GBLFP2292184.