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 0x1a635e51ea578f4e61b88e0cbb6508359e7cac6bfb53349756182c330bb82f9d. 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/74d9e46b-bd2f-4489-b232-451aa34a8a6b.json and https://artists.proofprofile.net/proofs/artist/74d9e46b-bd2f-4489-b232-451aa34a8a6b.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 0x79428bf32cb4b0a85add9e2e69ee332ef191c7e2869d1a38edc0e7ce873e9e76. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CH7812187614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b053bbc3b1a4d925edf15a7b5eb8559c11981db5631398a5fb2cb6320480df. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CH7812197896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15f926aa829c75b49341ab23f7d3580234bb22a3c03ddf4dd32b39343669053. 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/CH7812222990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d8547ad57db54736185a72492d22fcd0e49bde042469e4920682f82eae3188. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812222991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4312a1b3df0358dc6edba5e084bb9c8a4b4b0d9fbce6a69c1e11e97c3a21146a. 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/CH7812222992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487785d32c89bda6c009b823e0ca27d1b2640d712c36f9118c5b115840e2e8cd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH7812222993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188e060d8fa8dac1684cd85b677303d32c11c46160b6b14e1d0b24fe5fe4ff08. 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/CH7812222994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4291cf4020bc7bb35eaeb1f1f88ba172e6d07a7ad3fb14bce6439e3e4228ba. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:38Z), 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/CH7812222995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc8fb2647b2e8b5ec0af7c4a8abf1167cc6df0769482ce06cf09e0823f3d9e1. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CH7812240505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eaa113e68f53725f4f5e238d5c408c74468d768f676d9306c6a5abd7b5d811. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH7812350241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee4f58ff1230abfbe0416c649d0cab2b10bbd4452d7c96f2975c18edcc4454. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CH7812352497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286a35cfe98d470dcdd8332819f87bc42a58284738fcbccea2c500213b9cf26. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:39Z), 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/CH7812355976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab716fbfffcddf9b325eea304a1ff0e943f53ffcf8b49edd1394bf911320df96. 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/CH7812357565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee4e9f8e3ecbf9968782b63f99eb54299aaa66f8862b29a2efca1eff4d7f15a. 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/CH7812360094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcae99ffa0b8b2ff9ce6fe613872e928647435784b693af9136ceac74a930de4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH7812361655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a083e441c742d79ce0f40de0fdef6f62b298d3620ea5c93d71aab1677646f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH7812367541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccd4a2ecb2283a1d5f1b6e5599c000438f2d342d1dcd5026bdb4a5bdf56ee0b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CH7812370737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81fa3b6c29735e0697da1158f086bbc3c5bffb5a7a7e443f2d966d482a1c01b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CH7812400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07ceda3514fda8fcc4158b3320d47b28ee59cb896607b1cdd0bc073c30e1fbf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CH7812402660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a0127754c4041c8b422546c508f989f2aa1f2d805543d4816bad6d1e06dcc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:52Z), 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/CH7812407181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5b373ca02b346ba18e4cdba10813177d5f3ba86321e19f55c59eee3c0b8ccd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CH7812410997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4525b35c6ac9d7901b15546122bd06c028a4eb0c5abfb54b4f2dfc528a54fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH7812414883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dae58ef84b0e414d4174ce443ed6cf078a1db8c4299825994662cd86cc52a0f. 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/CH7812415350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200715334b005991982b660ee9e8f062dc306a5a692088e883a0d1b14c5b9d8. 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/CH7812420332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda92fd7feb6b530bfca2b662788dfa91af3dbad245080784a01ed038311ff87. 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/CH7812532322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a03f3ac3c7e2d932b80d56618d3ec153ac86840f91e85bdc5b801775d7b060. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CH7812545109.