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 0x8bd7706407b6089d284e8f0f093f6d45ae77e526762ebc50726bd3b5bd77be20. 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/5a7b419a-1693-4bd5-a854-530c55a4cfcf.json and https://artists.proofprofile.net/proofs/artist/5a7b419a-1693-4bd5-a854-530c55a4cfcf.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 0x74edd83b4c66264240dfe5e9609687c113d60ab7077843bbada396896ce30479. 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/QZAPG1804967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a516a4bc584d4e5c06076e68368a22c54bc0fb796b542d7739fefd48f845a41. 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/QZAPG1804969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e72c79f7811d1d119742485d85da9c371f87225d5aa27961f789c3c380812. 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/QZAPG1804970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bd74f2f1bb406db15a64e07e1539bc6b064555516641f24c1d33185bb913a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA41803068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b51a952419b17f45659fca68cce792acc44452ee96892fb6d33afcc373f30. 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/QZDA41803070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bc9983b59e7b2deff23306ac0f23deb8e5863a1fcec917342e956c73343da0. 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/QZES81838571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387113b4bebbb4f551a914df612cc91a750c3fee5d5cea7cf53ddcbae4396c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:08Z), 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/QZHN41966669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae905daf9b4cf65af6cbc1103b18a9b928334fcb50d66394bb7dd6133fdb3d47. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:05:31Z), 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/DKADG2201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfccae5858a83ce5d19d47381f8a65f4700a530ccb5ea52c7f189908932a0b9. 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/DKADG2201124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15d7c83018b67536cc59eee921a3e1531ef7b1f29537dc4117e358dc15c732. 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/DKADG2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a3124d874ce5618e43a9cb3a50168bee0a7f22930f7e8d64b3fe6ab7785912. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:42Z), 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/DKADG2201125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae905daf9b4cf65af6cbc1103b18a9b928334fcb50d66394bb7dd6133fdb3d47. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DKADG2201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab12f24f441b7729fe9dac2c15702754f6466d2faa91ed934e15f78d9042c6fd. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DKADG2201127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d13ef34a3f84c91cb56a1eed2dd464622f8358159ce4fc7430558e307f6b38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DKADG2201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44063f9580431498e491f952fb76fe2a11bec7c901bf1ed0391489285ab8c53. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DKADG2201131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3257a28f5490e34b5525fae55f0a54d0594a0773ac41df0a105c6149247d1d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKADG2300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72982f6049aef81eaf68214f95f012fab9b4ade732ed3fdfafd85130ff1f1a2b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:24Z), 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/DKADG2300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54185eeb704fa65cb247a74e6242cb9ffeec21f1da5b641b4071b06243ffa01c. 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/DKADG2300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b6511c550342b5cb54e7189a756f43c4e6353fab58070250e0f1cbb3745f12. 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/DKADG2400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09a4abcbdc574eccfcdb6b40cde54c8321ba06dc93fc7b22009ff3cc52215e1. 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/DKADG2400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7654e4310cbd67369684f229a7ddf21215d175bfda048190ee09c1e91f84f4. 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/DKADG2400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e244a7806279faf8d6c1ded3f0c479f391e85224d4f2e463b47cf829eecc169. 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/DKADG2400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc47813585811f121672c5fcb6cc41ad851b138f7bb1fe2e8cfe6a78efb90b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKADG2400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16b910298e0987bad5c63901dbf5f1f97ace8f87217e4c3b09bbb39a047f71. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:49Z), 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/DKADG2400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f44b47af653e2db13763f8aaaa1536c1992a1863d4b0df9fdd032e89da1aba. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DKADG2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47e7df07abbd3bea8bc1246f964b1a6db765ffa6b7c511422e98a32b4680a0e. 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/DKADG2400731.