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 0xb2d311a8834b607ef2e06892f79b2c175fe3687dd9c856fa9bc895cedb155c2e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8fd91b4-5e2b-45cf-aa0e-370f971ef225.json and https://artists.proofprofile.net/proofs/artist/e8fd91b4-5e2b-45cf-aa0e-370f971ef225.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 0x4460700e77351ce3a45e525afb8c58ba8f7dc3133434b1e921773ae62960826d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM22132194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d96ea467402420fd0c02808b99eff7fbab9232b585b360d097a7db84a97d3. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/USHM22132195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62142c14adc752c588b32c17c4c9e1d590fb6d033a4ba669279219ba42aa6b08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM22132198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4bac364bf7ce2f5ab117edb544c320cfa9521298abfbeaca9e6dc7b7e262d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:05Z), 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/USHM22132199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78feddbb3453dd322ca254841fa31dba4cb9de234cf5b45be915ba3e76352fd8. 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/USHM22132200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d91b4f7098d2da6935d66437571ab5a594371aa8dffb7b4715358c60d235868. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM22167003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b0ecf83a9f43f1711307524a136903e276ff3f72ed6287ce89e12679d6ea5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM22167004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5024725d07cf99a204a0f24d16f3fb0ffd7b263b576a6f7141d2b55a6805dfb0. 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/USHM22167005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066dac39ef66ebe55c6c5dd1b84d617f0236a1637aee8e163185fd843ce43a8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM22167006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db3a475d6a156dabb18638f530c9ee986b5e90b906841b43d5dc5dcdd5a28e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM22167007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18ad812eb6699ff91ab8c9dbf9ed7f0f79620ca9f1256bff8eef429373d9302. 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/USHM22167008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67288d8ea8699f3847720efd83f9143b6d9e556fa147eae73979a33d48b5856a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USHM22167009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6522ea3d92f03fe676c2caee997ef2711c4ad636ac59145410899f65a44a71c7. 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/USHM22167011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5ecc26330475106b82bb3614d104555dfa28a06bfea692bfd6bdd009f87b98. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:53Z), 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/USHM22167019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a23e1a536ec3f2c17f00c6c7849e90719a9db3d334e8c375ae700050dd2d0e. 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/USHM22167020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759f967cd78a4a394ec0d831cd7fc23be7aa4af833b1fb8f42f0b788124f988b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USCGJ2374841.