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 0xd53432433a96d62d22b8fed5415f4fc1c028f5747c875443d3d0531a25f1d1ba. 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/1b04f155-2180-47e8-85d2-5cff00156747.json and https://artists.proofprofile.net/proofs/artist/1b04f155-2180-47e8-85d2-5cff00156747.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 0xd3cfbf62b37f8359bcd47ac82b2c64321616a027ed76be40aa78daa7310e82fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAW2231074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd357735c22dc6f2e34a24d155c2916a8c48306300829f740b508b33ba170c94. 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/QZTAW2231075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2660b59e59249981cacc5612962b77b55309a7f2fc10014ceacfffb4f4d23bf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTAW2231076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f94d6a154880767195fb76add3c8a0792c551df0c34837da286441eeb3e995. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:48Z), 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/QZTAW2231077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac74ed17d6fd4a9e2daa2408aac44f3d0418fe658f6c6addebb03581fb38f8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTBC2381002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa406cebe1c287b86887114ed1a9810ef864fffd6288e3390194cc754417a58. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTBC2381004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c6361939f5db751425806d71fbe79652d8fff4efb3b984ea2a5f2ecd90e90f. 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/QZTBC2381005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e12427c1f555d8b46a9672f64b22a3e23dc9b4d29c67e86340c06b2512f9ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:22Z), 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/QT3EX2426511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eac565c2dfab56eb0943607d06025620ca724ac6a9005513a0c3e600a5e4838. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QT3EX2426510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae71af7a8026d46a9dd4c4106990f1e9bda409428b127ab26662c1d17c3c3ee0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QT3EX2426514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c5ab9ec1d3b1ec06f7d82baf7b0b07a7547c408bf1ae945a48996ccf349b17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:34Z), 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/QT3EX2426516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd8d697582402eccbfd0a26d5a160f7647e832445d3ef155c2c867c95974f0. 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/QT3EX2426517.