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 0x81686983676569a50c7f2acf1ff3c83d57b79697a172a3abced88758a30f8300. 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/08fddb07-28b3-4541-a52f-86efcb3000dd.json and https://artists.proofprofile.net/proofs/artist/08fddb07-28b3-4541-a52f-86efcb3000dd.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 0x06fc24f562da4771f46b4e91c7eb169169da5f0ef4c808eae839db16bb6b31f3. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USDHM0703732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1bdf067a3d16297594aa0cebea148f1026d7f202f26a345d4ef24531f7311. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USDHM0703733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eea3c48cc43d58b887953d1a14e4bdff71d22c49bbfa9fc3a6c62a8eef8d81. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDHM0703735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73307a0b0de3bdabd14ce6d433774b81724733ba4d61cc3ea71459c70e0f6bf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDHM0703737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b29a21bcf5d5c77a637c4deea74e5ce7761dec91ed213e63786fcd00f9d626. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USDHM0703738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee216e8ebfccb60a501434ffa6b1c202583f992b4d723eae1bcc9af6e7e42089. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDHM0703739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc53249efb9a41ab95876e9e6144d5815ab487f3f02aaf2775b2b812e62b1881. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USDHM0703740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe02d3b9997769d577ac88c2d480f160fd81221d2ef05a9513eec15e7dc9cbb. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDHM0703741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82f050b8081add1369e8f2bd21e7db1c9864d8332f14ab7dec5cee159db742b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USDHM0701501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b75fa1b063238eae930b5684c4fcb41354dd42fa873bc438b92c5ac993f45. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM0701504.
It is Finished - Part II (Hark, the Voice of Love and Mercy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4ba694367c9bee0d1eff1358af9213a590c60deb304ca8c49c61c7f5b4fd4e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDHM0701505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e0153dfc7d84cff551c6181c1d1070f2a2e9e5d67cb9780905e185e1242e35. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDHM0800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e63fe02b453dbc8a769bad97ae6d6271bef8f1d23a5a5bcc5b7b2acf6875e3c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USDHM0800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6a20dec26aed166f0a747aa35f94c953b4144ec839e278b053272fa8bc1098. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USDHM0800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44411d7811dfa93c5d0064a079c14dac8159d0e62b9f11a3f2759fed98e847f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USDHM0806940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b40397ef981d3f1a0768518815ef0cbe4e2802c13043e3a634245336907335. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDHM0806942.