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 0x6a866156f368bf7677e972bfe8cce9cb889ec0fbd799710d1e723115bccdcfb4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b5e0168-bcd3-47a9-9997-3e7a6460bae2.json and https://artists.proofprofile.net/proofs/artist/9b5e0168-bcd3-47a9-9997-3e7a6460bae2.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 0xeee593f4c0faff041041ac63bbb3b4e24c147160377ae41619cab47047570331. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ESA012076441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136802eba1b962af32db24203c211c57aec119e36cbb316ce6f4f95515a9c47. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA012076442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f16589f66eb84023a525233bc3fe56557f43a91a846ac8cd0424405d85c217. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ESA012076443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb452998f9f8f4cb21cbe785b0cd25f16e31ecadbe7024acf114845b171409aeb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ESA012076444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc824a5f0d165d7f7348e8072a7025e31821fba34e072604b13da7437ffda3d8a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ESA012076445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5473c79a1ec46daec66db3a1a73515c3e7e59e6fc3971957eaeb77b5909ac6b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:29Z), 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/ESA012076451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6722e3059e7d5df409926793ef998d453bd71465b5ac49930ad8767d552e92. 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/ESA012076452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe921900726e78419548c951c6d450ece89c10bd0a892ee699bcbe68a87b662c. 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/ESA012076453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1d0ccc8813c0307c75c11e4ce8fbf7ca64fd40a5f315cb4a5af640a4b7851f. 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/GBMJG1908022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcda21f9797484303a4b19a6ab3c272e3f0830460beec5eda38cdd7ae3025ac. 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/GBMJG1908024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbe3361ddfac1c06374f2e6580a3e3b47bb4bdff2fabbcf14cf06adf52a15a. 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/GBMJG1908026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1f9e89356f7eb2f311c1849b1804f3b53d75c5d77f6c281e77f28753c81a24. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMJG1908030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a5940ef055152110aac46eb7cd59b5a464b736906c73a3c59623ca6728b5c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMJG1908032.