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 0x049b40fc05cfb8b8fdf9d3dafee8726aafd3be9c32508d2a1107177d73630687. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556d3c69-d990-4e94-86b8-2845e0d9022d.json and https://artists.proofprofile.net/proofs/artist/556d3c69-d990-4e94-86b8-2845e0d9022d.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 0xcdc1c7b75aae8da0c3da9681c40c7075c9cb54d0a3690711a91fda40347d2382. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BCL522300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe369a86248f37c856919da99105e23129e883ef6b86327886a9ae461c2832ba6. 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/QZW9K2352950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3137963c1b1e2fe2958abf262789e0d1d85b1c7f96a660a26eaa67b37d8cb9fe. 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/BCL522300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd034d2bf01d51d95308907caaff0060e5d0c386aa73bdf524ae1581609fbf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BCL522400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd5b4d62d2a06b33d304b9c2e8a10982a689992bcd2467769529991e0ab94ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BCL522400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1501488a7db7a0cb97e1a45579121ac16ebdd01ad5cbecf2f0b48b0ca06a2c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:39Z), 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/BCL522400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71130328457e6955c79514abaa91045f515de1d7e34d108ac78cb7ff26627928. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BCL522400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43729cc28d34e147611ca1e93517ee96123a888ee9f43e75bd7ffefd62e78e29. 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/BCL522400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee14aae5a5c8de48c0647b47841e2d4011bd8c246714560bb53e3a28a0dddce. 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/QZTVM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b282663db14098122fea90a809f8264667ba68475397759e2a7f3ea16e2ba7b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BCL522400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e33491bc063ba8c5811d0db4f92dac8b06a332ce84829f9bdc2b7f8e0cf60. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BCL522500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b17092aee4645cbe7a5ec77e0b01184eb67fe11c018e0a5d5c9b498a156558. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCL522500004.