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 0x0cdc873e17cc51fe622cf4679a09bb74a4513846e25cf873facc9bb53ce40674. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dac938d-2acc-48a7-8a7f-a8aec9fbae38.json and https://artists.proofprofile.net/proofs/artist/4dac938d-2acc-48a7-8a7f-a8aec9fbae38.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 0x18140e54f148b9807b3978cc54f149efaf66aa07d1c8567d241bf2367827125c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMER2297791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcc052fa93e19ff2cb01ad1c2e25362114c88b8af7837e2f5a0621fe05b911a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMER2297799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110872dd03f3e6d3d0f6018627fb7f5ffc67b7d1bf2b26d1de681ade447d18b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72384239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8339fa91b64f1108b58bfe683e1d11055f47b5b44167161e153284d5032a3b0f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZES62323924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0047b13097df063cee279759458a2720a2a00d55146e014e9349c6cfe46279. 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/QZES62323926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395e453c9cfd776a3bd82f34204aa192a61b78b2ef27c989ecd7e109c9dc6f9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES62323927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb2f184ac0b892c976747c828c3f4162e541f89d015f9977b639ae447535aa. 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/QZTB82427463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30581c6750ed153a9e07ae22ceae57d4e343d756f9f1f675f4b5eb60afc6ce6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTBD2441449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03155eeb50884319fc98eb57d4783606f93fa9700fe4de8e4819099c2645636e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTBD2441450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee9185bdda3ee3c4fbc933a5c192a1b8005c1b24863642f75e0ab2827f5363. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTBD2441451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd70d38c2ec86e30c8b88d633362248bf74b83d9f6ba06660135d574c071d47. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTBD2441453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3dc634cf46440abd3d868edf60f4a0bf69ff81a0eb99722fb2510b94c1acf1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBD2441454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d30884467f5294f17c528f823cdb6636a0c4f62577cf36643ac63c2cd817a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBD2441455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6c8acd385f6054cc27205af7f0330cbbdbc420318d7b432ef03fd7984c7ae8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTBD2441456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca071d14c32aad3cb0c01bcafd4fe3f4004d47a5cbccad6f2bf662ace92067c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZTBD2441457.
Ake SAke Sime D'nai/ 10 Toes in the Hood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3492353a5ab0a14e4ef91348148039a762cde6168612180460e851ec7138a9ae. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZTBD2441458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f664a20487a824aedaac0d6eb45892f50b6cb031a4552085eef56af96d7073. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22534200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf58fd4e8dce306d59ee9c632bf195a4b79ebb4fdf5f81abbe45797ffb27f67. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/ZAC582500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd963667ab7362bec80ce99f01bb83669431f74a9a47ca1bd4c684dee3e816e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ZAC582500585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54153cbf5b2789b7c71f9b894ae2642530cc9bdfe456504d259e5c5be14323ae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZAC582500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb7b287a3b88fa7337c2987d293e3487b03e59797d85db85392beda1dd67cf. 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/ZAC582500588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189bd9e49bbc8642c0ad44df13fd42ee8a5bc6334aca35386e9c702b9e34d084. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ZAC582500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c2178ab170f316254fb44d35bc0b5fa1b1cfdbfa9b16ecc4d0d5631cecaa15. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7W2567381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b62e8cbd3a48959d586701b0a833860ee26324bd78e86d6a6eb395ca100cc. 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/QZWFF2383361.