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 0x723dc7f1651695d877ab1f91638e647b25bde057191b2565e738a241a3db2dc0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3138fc0-c0df-447c-bb6f-690bbb7f1f38.json and https://artists.proofprofile.net/proofs/artist/b3138fc0-c0df-447c-bb6f-690bbb7f1f38.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 0x16d52ad72d201dc240f4bb0d30c0a1be0e730bf1631b19e6b66b7d54df5e317f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRJY41400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e999b9db90e2bb902ffabdc7ae1fb37e7553c16904dc5408b2edaf294eb9016. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BRJY41400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca57691d2ec73178e6eec3d1a79b5ece3c11c2f9c402c9efcf7b7563a4bf38b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:26:22Z), 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/BRJY41400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc775c5e13238c1dedae55feadfcb00f1b8867d2ebf4e9107ca0480cbd09a203. 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/BRJY41400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a13b4a5d58aad61928312efc502f46c96761bcfa144ca5c5c31777305a884ef. 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/BRJY41400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08167473edbc8949193359969f2aa7f32fe8d6fd17e20493a85f3ee398fcef4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRF2G0701045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264a5dc15c353e325fc3a9f435aa8a02b03e3a0f0b013998d3931229650cade. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:21:44Z), 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/BRTRB1863516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c16a7c04c918498d3004f454852a6b16f288e85878724daf210bbe2961421b. 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/BRTRB1864002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b38ebc502223491cd37d8a0b6c24ad2829107a7656ab85a4c86fdddec006a7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:42Z), 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/BRF2G0701052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf044a06ab2b298f669754938fad1671e6f940fbefa4ce42b85bf9ba1837c67. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:30:35Z), 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/BRF2G0701053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4826ac7a3d0918acb2e1a089670e31dc1fac777fd3950e9c11420810f7348. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRXCH1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab170d3728489c3b4c87d30c81b5d5ee16ee8ebcf374e61f3df5d3802eecf8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BX3A11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ea4df9c867c09db14996b5868d7c0e213683d904688726647ac3633f4cba7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BX3A12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa191e20e8a4fb20929491d8cf2c09f6d2436c2d6181dcb5e1b82eb3bb77bd2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:27Z), 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/BX3A12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba981d153ce2789830941789856cb1aae91b0ca5d28ce0f859bb7db52e1147a7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BX3A12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ea4df9c867c09db14996b5868d7c0e213683d904688726647ac3633f4cba7. 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/BX3A12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa191e20e8a4fb20929491d8cf2c09f6d2436c2d6181dcb5e1b82eb3bb77bd2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BX3A12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d3596be30ba9493262fc3faa5fe170e8e0564bc7294db7c740d5b81df8538. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/BX3A12200144.