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 0xd89398dca6996b85dec9861c1f2a334b86c24cdd6ee7c66369c128e43e0cae6e. 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/3ef30942-b5cb-4bb4-acc6-d39972a3c90e.json and https://artists.proofprofile.net/proofs/artist/3ef30942-b5cb-4bb4-acc6-d39972a3c90e.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 0x115e4dfb67101bb3df01b270d3ad7e0d2648405c50cbf7f65a543b343cce6ac7. 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/QZNWT2033690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1786607bc13556f55a2ad1fb5eedf6c2fc55e8c8b99e13e45e28a9716a4af7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA52115855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5680a693d1864bda8feacf3c70a79cbbe274d35747a715aba7c0ce60e4505c. 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/QZDA52113159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b11d78110debeb931516d7eb6a2e3b98a50d15bd4387a441999cdf77575e0. 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/QZHN92108748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280d0fd01af0705996f9839d6729c87521dba31be9fdcebd146a3c1a8aa422b5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH7811109898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333bde080599345face7e89a6c31bf3d20ee4a3b9a8259cbb6398160cb6b02fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7811109905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280d0fd01af0705996f9839d6729c87521dba31be9fdcebd146a3c1a8aa422b5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CH7811109898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395153bb4fffd57d630651f5a857e0dfdb27a5c14927a129110d4ac7ebed286. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:04Z), 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/CH7811109900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bf7f433630dd9d57d68b35e4e99cb496b243230f368eed556f9d1deeef1bfa. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CH7811109901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad1b149e97972ac9746b63d1f15a8641686c12bcb6f45fd710801c5c2b0eb7. 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/CH7811109902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d1c69b7b1defc8597a7586802d70782c1d1ab04ab79c8bedd450d65bbd49a7. 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/CH7811109903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333bde080599345face7e89a6c31bf3d20ee4a3b9a8259cbb6398160cb6b02fd. 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/CH7811109905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56006d8e1bdbc0353dfd4264ffc4c68ad68cd3cffa86d95e81cab95de45974b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7811109899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d1c69b7b1defc8597a7586802d70782c1d1ab04ab79c8bedd450d65bbd49a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811109903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333bde080599345face7e89a6c31bf3d20ee4a3b9a8259cbb6398160cb6b02fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7811109905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b05c5bbd571c257750a3f1dff584879176fe485556b72f5f51ddf01e823a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7811111182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03086a14e5d161a855490ce8814b83d248ebb50d6a61376c9f22daceb3ea38. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7811111185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56006d8e1bdbc0353dfd4264ffc4c68ad68cd3cffa86d95e81cab95de45974b. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/CH7811109899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d1c69b7b1defc8597a7586802d70782c1d1ab04ab79c8bedd450d65bbd49a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH7811109903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b05c5bbd571c257750a3f1dff584879176fe485556b72f5f51ddf01e823a6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CH7811111182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03086a14e5d161a855490ce8814b83d248ebb50d6a61376c9f22daceb3ea38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7811111185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1674ec5810af292f116127620ca66e89421f858a2a4f3d21326c881c7a34614. 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/QZHN32438294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24f357106003f2d6f7e99825d02520105646f14ec2c4a113145cab4e004147. 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/QZK6N2488186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19d835e36318165420cccb954ca64c25ff28e9b89b51b4876414d2b359701d6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWY2462940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd479e66137a0e8d53582d29904a764d6b4cb3d35821705e9f2df67d360414413. 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/QZNWY2462944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77212beffddf56a63c87224621eea112335cd32329b9c5b2008e8c9409de3c17. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZNWY2462945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579d7f4c44fdccdb441e2bab4cc7d6efde7a1bf9c11ce876b279300585aa60c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWY2462946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6dd6cdf4bf24eb20919c6a19ea258250e84824dd1f93a1e83505184d9e0bd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWY2462949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2104f9eadebca0ff9ebf3e55fab264554f4af2a8b05c165832494c16a54d414. 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/QZRP52447607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24460df8dca01ebbbddddcddaf032eaced09e539160207372f2e31979191fc36. 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/QZRP52447610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d82cb5a97c001f1e704ab166025cdb38e6900dfd205980deff4f72ca324cac. 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/QZTB32452481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81a940197b21686f84ece04d444b04a9af9550559fd1ac5a745231b578d8b5. 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/QZTB32450155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03769585ebad2b604e69bfafaef2a265f4a39169a65a32d93b1abe8715a54c02. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB22536569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe56e25db918adeeebe25a40e87eed5365e6cd1dfb17d85a5a38b1c908e423. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB22538130.