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 0x8ae410d8924828857084f45eb20dbcfd77c5fc84a9a46b976fbbdf6c84190e8d. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31e72e28-d923-4edc-9bad-9d960ecd7667.json and https://artists.proofprofile.net/proofs/artist/31e72e28-d923-4edc-9bad-9d960ecd7667.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 0x2ef80e71738ac863068b3841b72dc5099ca71d469765ac7fdd100a39b4a1c548. 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/TCAAZ1119857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40021b38cc73d7a1d5a380d3e84e65b1f74110dae744b6e5f933a6f4a2faac3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAZ1119859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477757eb5ec49e44499e4bd8f581d3e887a60bf838fde2f7bd1ab7fd8721fc06. 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/TCAAZ1119861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35f96864538912d8d323fe49a90961c4bd350d8caf7034ddf25068e19387c2a. 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/TCAAZ1119881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651eaef8d7ac12a2f7ce90ea49885fc00cc9c8c601ae8ba6f323ad118a17ae3c. 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/TCAAZ1119882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ec345e4441a2534a1fb629ca13477ff7471fd5fceb64be43c8c5aab1078696. 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/TCAAZ1119883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a937d637ae434b88c164f7cb4a3771edf5438a965e6b636b22a6245e106101. 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/TCAAZ1119884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc010cda98a50113e6c8fb3c4f6d7f5769ea9444858a208f3704a13e3e26f1c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAAZ1119843.
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 0x20231c82bdcb96f03dac58c95f6306d0d6b9a4da03c88d1d868523e3ee7a2588. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAAZ1119858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673927ebc9e306b15236af708fc7b0db1f21dd3e6c5cc8cb4fbe598e14978597. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAAZ1119885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1331ebb84571344771c2911b06da87ad7ca25fe4775b10673312b1d2c9a124f. 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/TCAAY1125678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89891ccfc7590ffee5989eaf36b3b28f25fe0c02d088cf44d800f08a645811. 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/TCAAY1125688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376f15113b8e9a765d265d24a7d82f1d6143bf6ca60091f28114d8fe9b9cef62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAY1125691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa483a003640997b86cbbdb40940bc693829ac65bcf3df33751d8b3b66f36fc34. 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/TCAAY1125692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b5cd8462ff42392aceb4042cfa23d75533a4ff08b34c4a1f69689a166eb29. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAAY1125694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aecba9b482d707ba201d1110fd7c9c1d24b2accae141ff80808263fd4177db. 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/TCAAY1125696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a44e31f50b7ec212df02a7f21c05f67d5ea2bb3fba4307c4cc37b291da38f. 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/TCAAY1125697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc32ce47eda478520cea181d9f1f63cf96d61717042e9eec0caa01a64f13ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAY1125698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacebadb3ade1591ec10795035e5c4102e0a9a1f0833ce48160afeaa892a38f8. 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/TCAAY1125700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16b82a11ccbb109464dccaa140e27acb346b104875075df0e2e92c338215ce3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAY1125706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35950c92eef40c8c26a9261ca32030c00ba59cafca993dd33177ae4b1ee7216e. 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/TCAAY1125701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbc3e70d41d83761a95177042d5bd4d30ca2efb9f68ce2ba8b03aab116f20ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAAW1163183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a35513caeab906c281524475a073e868a380be9cd0d4bdf1a20e34527108d6. 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/TCAAZ1123300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7874c0d29e900e6fa41406d259785a44796c2fc7511a8385188d9c5f51bbe56e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAAZ1123303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a261524ce5432666b53c7049b65d8baf02448cca3f42f1f137afadfc61222. 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/TCAAZ1123309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a9241981b6db69ecf5c75bfd3e9c03bd41796e1898ceea11aa962bba5fdc58. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAZ1123311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4ad2698d633fe3d860bdb9dfd5bd296dc207ead7a836b4ab47141e1f32a0e. 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/TCAAZ1123315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69706102a7b8e7f32c61542d6fa45848cd04dfa7c6f2d3c969db7aa0ff343b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAAZ1123304.