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 0x9890035ba24a79981ba6cde7190e843b9d2e8bc3088ae7a98703e5a3c9aaa968. 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/bdfc8586-eaae-4929-8ac0-1ab2e13d513b.json and https://artists.proofprofile.net/proofs/artist/bdfc8586-eaae-4929-8ac0-1ab2e13d513b.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 0x76f93ed1009832ffc5d4b4dc2791a818f80c5d14a1fbc742433adeec44c80241. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:53Z), 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/QZXLZ2513043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33d581e90cc7236be9f0e825b6c29ddcc1af5e8277b6a61d69dc9ef4d17e101. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:46Z), 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/QZXLZ2513048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8407091d14344198bea1b972bb48cbe9ae667e0d86ebfde40ce3a5db33b49eb. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:51Z), 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/QZXLZ2513049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92050bc6adee60249ea573fd5c98892d40a6a1d7947ad4227a1c07da318046e7. 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/QZXLZ2513054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb4ad805568391fd6e3535507b506f5ab671b3cda0ab6eacc80c071b1793f5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZXLZ2513056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41842cf26ae13700360dde9b83d31b8b696c8c44aaef30fb1685cf72dd667535. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QM6DC1610541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460072815a92536c234bb428ff203a247c9382633a0d11ad95a0bcc911fe9e8b. 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/QM6DC1610542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dfbdcc9033e1ec420ef269b373c8c31957b3dea1db4709a5ff78cd2ab1305c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM6DC1310163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a896433d64d004a086fa1e5213eae383a568d12ed851593fd43ab071085be60. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM6DC1310164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4918a8a9259c18f7d83616d1520592782b6546a2e176203ad284728c1e3dded5. 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/QM6DC1310167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f8cd31f307131b96030dc509e399ca8caeff35d17381676d25ba818a68e52. 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/QM6DC1310168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b199a75c74d78f416c436db2faf0bba333ad92e051ff224e8f1d64ea1655eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6DC1310169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7772b82e5c2cb5885e130272060a926ebc9501619e36514db59771f49a2021. 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/QM6DC1310172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc4a45c2d14055d0f57dd033b8ca02f109eae1b09e575bb775262286a085c7. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QM6DC1310153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ffbd397dd340afc3f3706440a16610bc7c5f59140d9cd0c8f9b30df884ef3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QM6DC1310157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378269368439ae653966f88ead120b1887576e6b6a12e1c347549a92fea4733f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:34Z), 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/QM6DC1310159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3655fc92cc9609d6e7b24b82713ff4ab97d1400164f7d783510462b7c90e7d0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QM6DC1310161.