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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd5b8010ef3d08d249fee727ced4cab3f700e04e8b3d5eb3209fb2a66547e56. 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/e48067e4-f784-448a-80c6-617f970b9f52.json and https://artists.proofprofile.net/proofs/artist/e48067e4-f784-448a-80c6-617f970b9f52.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa471b0f59f4972f89d2e16059d079c378f1ffc9f738ab8d16da52c3f3f3de9. 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/TCAFN2124038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf3f0760addcebb9df94bcab9345478547159b336be8b1475a830a87069b74. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAFN2124047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d83a7815babb1ac03ae0d75f7185be4f7e95fa3cccbbc675d3e982ba7cbcca. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAFN2124117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00a2e1f3ee31754a85a50970261d6d932d396a3cfdc3109489fa94eaf8242a. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHNA2297690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d8a3638c53d694e41faa7c23d01089d56ee250ccd51629335aabd1bbd9571. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHNA2297691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ca5df42684d2477a6185f170fc06f7e598c1113460f8d1ccea96bc2af2e834. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6L2212423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7069bd620412b15df200af0d481bb6db70dbe1c7db836d188773dbe5598d71b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZQAY2439555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7a9fcabecf26a39705678ae37ac1128c1095af4f41f342bd80f720c48d970. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTLA2422143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e52db2a0de35475bead4a0cc7400e1ed51846f22875d4b3a0e2da89e28a681. 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/QZS7J2495704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401145c7134413e9df612a444dbcdb55289a2231bf17c4fc7b515858e9626f64. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZS7J2471907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6a8169bdebf837fdb6998bd6dbdc838eb969a24e79d7ce57a388820a08b706. 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/QZS7J2463034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e3afcb54f725541b3891ff378d9c7fc2b6e66a7078fb374e39cd9134bfa13. 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/QZS7J2463980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf75360f7e8062b48cd7fb59cce438095bb0e4ac99f48aa439e975bf4578df32. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTLA2594600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7022abec9b7cc9eca3951b1a2c23b9c89865cdb3c540b305142eed732411ee. 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/QZTLA2588518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ff880108914b478eafe157804f3e5530df4199bc3f24e99ff36389f28e5e64. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTLA2535945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085c39958a400800e03d6a88544f67472606f9ae911ab82b9cf539941f59624b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTLA2582229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a721f0c0a0125d83c0286a3d3a8b9f1bbd4ae965816a3bd56b0cb5a586b053f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTLA2524560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139712b30ed5c7db7b1f82142831d656efbe00791b8124029d132719e9a3c6c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTLA2574511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7111171462fe31daee87270c979bde859300558bb39a7f217bf8dcd699e9b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZTLA2564798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2001ea6bbb45cc5e3e9e9c72f89df9ff00a4253f7ed9fd4a24e8504b54150d. 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/QZTLA2577013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e2b03c7e55a4217f7cdb514b5982602258c805c23ec7829f2cc3185c86fe66. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZK6Q2074673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec252f49ed1ba2a3bff183d9efedf90f8a7ef06f1ba22f33d3e57ee3e430f74f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTBB2325941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354d447226ef295979910a4b4b2121481d636dd8dc8873d7cfae724206924c2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6M2340202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70d2a2074ff7f253cde42f891df04d2a0b135def0b01af3c7021908b17952ea. 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/QZFYY2311843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cc495a11084172b0c05e6ce0ebd1f50f8bcc350244daf0725c6894ed25eaa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2463326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ae9b0dc081e2f5ba8c739a7a97877a5949a7860617fe936a9c74d743bff020. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZAKB2421268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bffff32c2fd9d1f6957952403afeb5f07d583a90032ca0f07d53fd5d80c006. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZAKB2421266.