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 0x9b6ddc594b92fefef0dc8f4d1b7e13e3d983d4051e45870b342227deea6e09a1. 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/de0470f2-767f-43f2-b217-f37f421ac8df.json and https://artists.proofprofile.net/proofs/artist/de0470f2-767f-43f2-b217-f37f421ac8df.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 0x8969bb479895a59e5b8e2143b0a0eb28b01b8366d2c8e14d67455ee64a198fe9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CH5482300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbe58021eea36f264394c306b9553a7aa550b4820b813647484d1daf4fcacce. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH5482300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5388f15c08c9845f16c2b8e7e1fff2e766140bed7c225c176ecdae20d3a4582c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CH5482300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbe58021eea36f264394c306b9553a7aa550b4820b813647484d1daf4fcacce. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:07:35Z), 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/CH5482300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95da7e37f8af000d7de6c4b6217d51ba9d6623620438e31eabc35a3502d4868d. 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/CH5482400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd2394e70749bf2bb8f0ece82168c041d1a23ff9df16cfe48baef77bbd49cc5. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CH5482400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95da7e37f8af000d7de6c4b6217d51ba9d6623620438e31eabc35a3502d4868d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH5482400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61758d7b3e21ce64b8812f726ff23d14b6577ac4b7601994c1790c5f0d2a2d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:16Z), 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/CH5482400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c16d4bacd74c94560a98aa9feb5f10a5e3a05487b00678191420005a4f1a28a. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/CH5482400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5388f15c08c9845f16c2b8e7e1fff2e766140bed7c225c176ecdae20d3a4582c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CH5482300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8969bb479895a59e5b8e2143b0a0eb28b01b8366d2c8e14d67455ee64a198fe9. 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/CH5482300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5388f15c08c9845f16c2b8e7e1fff2e766140bed7c225c176ecdae20d3a4582c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CH5482300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eddc2668b6cf9ce9b7f226c10a1a68c27bb2a8b86d514d04cb79350ec999964. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH5482500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9c190af2b357ffc61a3f6a1d13de0b93d94aba021431bd38b7ecc3f96c044. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:32Z), 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/CH5482500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9c190af2b357ffc61a3f6a1d13de0b93d94aba021431bd38b7ecc3f96c044. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:31:56Z), 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/CH5482500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eddc2668b6cf9ce9b7f226c10a1a68c27bb2a8b86d514d04cb79350ec999964. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CH5482500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa825be00674e63784975b738e1cfd1f249c2f16e0df71a89d3b80c28f9075b04. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:28Z), 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/CH5482500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b791f84b43b96fa6118a92274c79f941454079e5fd47bf0e91b9462ebde48e6. 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/CH5482500037.