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 0x2c3dcab429c3064ace45514ffe6729bed4acb6d1412cd997cac42c92e64929a3. 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/c7d9db9a-77c0-43ef-9eb1-0801c122d0f8.json and https://artists.proofprofile.net/proofs/artist/c7d9db9a-77c0-43ef-9eb1-0801c122d0f8.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 0xbc8e6044067f5ae7654197cbd99f11649e1de90a0545bb1b5b9658f1c19a9dbb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USTKU1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03596987d042864d5a858f3e8baa0c4e6dbe74f77e60cb17a2b2e981abc867e8. 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/USTKU1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36a702911a335d42268e5d0fa2031beb832ceeb49f56ca4730b5e184a459f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USTKU1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a7b7bd37c3af01279e01ba68b245db3a10bfc6bb31ba68be2cbc655881ab4. 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/USTKU1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d124aca318a929be3b2d74b52680ba888de6a026f3db407522e58444b8f4e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:53:36Z), 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/USTKU1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5732855c4bcc72c35d61fbc547f71e10cb0643b484b44bff848781b5738251. 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/USTKU1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16c915d47037f42f28edbf3461430d65ee85989b0f78f437e908cbd13e6a65. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USTKU1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03596987d042864d5a858f3e8baa0c4e6dbe74f77e60cb17a2b2e981abc867e8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USTKU1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36a702911a335d42268e5d0fa2031beb832ceeb49f56ca4730b5e184a459f9. 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/USTKU1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a5352da5a90488cfa2461d8af71315209512b6c6df154aef967b6b9855e35. 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/USTKU1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d124aca318a929be3b2d74b52680ba888de6a026f3db407522e58444b8f4e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USTKU1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5732855c4bcc72c35d61fbc547f71e10cb0643b484b44bff848781b5738251. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:39:12Z), 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/USTKU1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16c915d47037f42f28edbf3461430d65ee85989b0f78f437e908cbd13e6a65. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USTKU1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8d55d10c80b988b59bc93d2130a0d03df5bc7bd47355f6b38b616c8597df5. 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/USTKU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8d55d10c80b988b59bc93d2130a0d03df5bc7bd47355f6b38b616c8597df5. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USTKU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5e656d2c87b0cc5f7ee2ae2198f7d87aa3eb2e4fa24b260ecec130bc5ab4d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USTKU2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699c18f724fb2e841d7e65cec263aa7eada3598e49903fdc41c57a86c3243332. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USTKU2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f5a6ae809732c999aa6788f8cd243dd5fb12e083bc0f77f2bfc76c9b55ec27. 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/USTKU2000003.