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 0x77f7927b385b85fa6f8b48d686fd4e8377499911deb0dd57d98d8c24f8d10d0d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bab771a8-e34b-4beb-aa2c-f4054bf96b81.json and https://artists.proofprofile.net/proofs/artist/bab771a8-e34b-4beb-aa2c-f4054bf96b81.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 0x7fb25c3cc4d44f30b39f3686944e68bef1c0f6c4f4183643a5541ba9ba88f405. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:48Z), 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/GBSMU9464037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef39bef39be24ea1923fbf57ae1c0973cbcc701fb5d03af46f62f6079ac47b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBSMU9463279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d403d4a1c5590cd41b61ccf9a5924599749fa8ccaccb1e199c15c263231be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU9463280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2e13bcd25e8d60229cc2b7154291296588584dd5a96b0156c0a6014f5b580b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:23Z), 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/GBSMU9463283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a83a271dd93a845735eb8f508b57471cf8ee2accb64f5f52b451012ff8be411. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:59:57Z), 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/GBSMU9463285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9528a224b333b591bf0d48cecba7abd1dfa761d3e6b14d12358c16ca7355d3b8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBSMU9463286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3690f42b988db615e7d3848dafa72f1d02b2721786aba14b6cbf82ba3579ddd6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/GBSMU9463287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955da0e7cf93df1743c38cca07683c4dcced8dec587d82a4c5dd02dcdd4dd4e. 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/GBSMU9463288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3a8ae40ebfd9cdf109ae85c15451bb4bfdfcefde5b301b47ad4b71c25ecccd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:27Z), 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/GBSMU9463289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235412b27ef7bd4d3d6415728e6f80d66f5e8321a798b9d00c58f98ea56ca57. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU9463290.