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 0x6179c27da0298cd125c8c775d8799619ea7c677a047de8b0fc30e40376c83bae. 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/1f542de3-cb2d-49f5-b3ff-7accefb72391.json and https://artists.proofprofile.net/proofs/artist/1f542de3-cb2d-49f5-b3ff-7accefb72391.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 0x6172dbcad7351ae1da71d30274f694c51541be3907bc2c6311013de93a9f05c7. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GXF972499388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0457039eb2a9415235a2f96b7bc85d3bcc26ea913b3afd1a97a729f10f847185. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAY2516759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c39a8ae2132056c6fcc9c2199e95922920ab3e41516394c4129422327c598. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7N2461384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7660afa59852032789ffb595f994994072b3de5f50b80dfbe2aa357c6dff8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX89G2482313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf690154eee661e72179ea58457d4a833c498937dd4f2f316a061bc096d11e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2520007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4c2a48d5217888f9911e16ac9c4e4c60a0cce2f1cc62fdf0c065ef71b2853. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZZ7N2461400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90824a7f7d34ab4801f2ce902094650666cb9f00027cb34ea6e1c12a3add8e4d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ7N2461376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3987a2f89f4c6c5e8e4282323760a76f594ece8b38c78073a30a4820fdccde4. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZTBC2539256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c19e812cb5a0ed6afa24c405e390825240303f54499cb1e89aa4ce8ee7a8e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNWX2559639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc322b5d19f4e08b1f24886a2bdb5fd4651a82074e3185b67a0cd9bade26cc559. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXESV2535793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd04157286980fa29fd3b5ca231babfd4574ed129660f13d606c082ea06004a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GXBDS2389617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314000c42d11b98760242e1bace3b45b6501288e5590647ef1e7ce32530b0c5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZPLS2598588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f863189fa4b199250b014a109d715aeadbf1a10eca47b84c69557a2a2bbc3f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEM2527157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528fb677cc86c6f0ae6edc5d608d81be51caa8986e9aa56d20b85d6543bf6ed4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTBC2539393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff202870058d84392db972f1c3542ca5b2c4be8adf31ca583b038f50e4107fc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GX89G2442653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8a7af3844e8ab4f5888c0eea325a500b7b39984c3738b46eac9f016720467. 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/GXESV2556570.