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 0xd656e3b865a0c7e5d9f0a32a04146f9839ab3c9065a44e54931390379c5ff1b9. 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/5f161bec-68c5-4380-ba67-55e0ce18f4ab.json and https://artists.proofprofile.net/proofs/artist/5f161bec-68c5-4380-ba67-55e0ce18f4ab.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 0x77ad80929554654e762dc87d1cfffd49eed06f9d274fa06260fc8aa16818f019. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:25Z), 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/TWBF31804001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968361d48f8aa581007e9fb3acdd9e54cf4ca22a68fefaf561584bfe1d3dba3b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TWBF31804004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa32cde7962f9efbf8ab647b5101c9957d6475b0e8deab7dd32eff54a56a64ce. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TWBF31804006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313d8384ee5ba78c390855e2cbb52c47f27f80783afe25a339a35cb05db35442. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TWBF31804007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e38918544f264dc1a2a20d0c7fbeae52f8faf43a4858369e49dee6ffc88537. 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/TWBF31804009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932127777b1523a6bfde918e4de0800de7815ab4ac25c06609717331227f9750. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TWBF31804010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71419de42cf323047caa011a21cef04451bccf1e9444c792b0e46fccd91f5b5. 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/TWBF32112011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d02a36fb72551d3ae0d74ef305d19ccfc955b561927d9ae94547b8b72bccba9. 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/TWBF32112013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c8a3bd31916b251fe11f3a96479436d61cb42c3169fabbe0b251ec259bccc5. 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/TWBF32112014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed58aa5cd7a83e5f0659a998945818df1914c5acac072c7c6e9817e031d94930. 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/TWBF32112015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27faf536557becc7e103161af8fcd32ca92aa7cc4f5e1373256a325e213c98f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:07Z), 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/TWBF32112016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7575c17d5836363ca5de4333e4dca80849f2638cd4f969a347db394578dff4b9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:46Z), 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/TWBF32112017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2addb011d64d33c782ac3d73d8ac59fc0940793e6cb85e10d7f2dd8887efbd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TWBF32112018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad76b32a3df05f942548081c308aefc75529c2701a341d03d41bb4f8e0d83ed. 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/TWBF32112019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bcbc7e61d8ea771d150a00e236c3c8f7e14bb53f43ff651b6fa0914e0b5d1f. 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/TWBF32112020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c0f982157c2db00df3cbf83ea9eab0bcf9c4c2e1af96a92633f487d7636f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:06:42Z), 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/TWBF32112021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb570958b890b89084663f88eea70266de451df045cff26ddea550aa61faeaa1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TWBF32408002.