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 0xc8ad4f551c2f4e7e98aed565d05cf2f22576bd0d0a5cfa6055f4f161d48a3884. 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/f62552fe-b545-4847-a9b6-53aa0a6164f1.json and https://artists.proofprofile.net/proofs/artist/f62552fe-b545-4847-a9b6-53aa0a6164f1.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 0xe6c23d1d76489f58faac6417b5af5326136200f7b7969e0716b9a9128fd2e807. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1749425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932029b64b6b5e7dbaff121898bf0948ee3bea287413b06cae7b69bd4c463e8. 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/SEYOK1749426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24b6df9a1db574d7b45199f52719d5edaf9e758d77e0e9c10bbb29a3caff857. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1749424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209204eb9398f77f3cadfffe015b26cbe7e09d10e8e609bc25ac3a03ebe5d5a1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SEYOK1749475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a88235c1ba1cb1388d95125c0279fc9cb430243f2557f6bd76b77a2a4fa1414. 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/SEYOK1749476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb1269e73fe6003df1601a4c4358f6fca7f6fe8786e98fecca749059104f234. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SEYOK1749479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9857561f154c1c813582bfb6cbdb52632964b3dbf8b77013bf8121673d19e6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/SEYOK1749481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30327f90294a0e8cc4e8f3b45be24f24a2882974686a8dc940c730800829b7c9. 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/SEYOK1749482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2537091ec180bbe0b112bc2d8f169ae60974c8809c5b20c431d7ed862c4cbf74. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SEYOK1749483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc856e8cb4a49df57486f5204490f75b4e285825cfd5e40c3561636cce671d1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1749484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e36724b3fb7c78c3d3863c79fac960b5df06ff0b6fe308b4e47c4b8a22e745. 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/SEYOK1749485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d02151d7f3d6bd1f6e8d8c6a00d4751af328659d4d031ededfed8aff08dbac. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SEYOK1749486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed021051c7b28e6569db24e04b987da11892c5021ef5ef90bb2810dc42ca634. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SEYOK1749487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee48ff44c6cbd3203fb00f41d81b112b33f743d0b862b556dba4e09581643b41. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SEYOK1775942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2c67c27ccf0b89ab10933dee6585f735f66ebe5d7da333aa00d6a56701f1ec. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SEYOK1775943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454a4134c5b5371a2f06b9cd646d5a527c827d30e9455cb45f6011ca9cee1164. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFT2496992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813c46544d3ccdde1d0d6cd1493e69e2ea33fde9434a58a7946c2da35d17c987. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFT2496993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3f31c8552e01a30ccb05ffc2757b8fe32d032eef599d837214ce7064344b3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZWFT2496994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe555bbe83bdfc6ecbcc5e1b0ec432f33558c24365245b7c95a7957550bd5b5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFT2496995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd45844f015328f57b6ad0c7c6307e3c75adec2b13228a2d44eed93af985cb45. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZWFT2496996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5574730971239371a533cbc1a51232201d93a1affe5124e62ee9a4428fc406. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZWFT2496997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888128f3fc998f0e42b5d6a2340dff6ec87ac283bcf7b07300b3225003ded6f. 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/QZWFT2496998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc380f410f69b6ccb333e985312bbc1771642f035d538504c0c08a307697cb7. 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/QZWFT2496999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a68459cb86aeeca4d3a81a48ed1718b32eb78392000f9807c509916481d6e8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFT2497000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded1611be5cf6438c3386b7634d11ef5d0a40705f2103f6098e42d74160ef6c1. 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/QZWFT2497001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9458bf9e458a179ac3547d6911d726ebadec40483cc0e1a5ba8bba13d86398ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFT2497002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb326db6f202f1e0032374b487564b2dd0badf77d3304bd733ae4672e9fe5712. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFT2497003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52371b1ffd515f3f1c03ccb1f78cd44307f02d23b4e26b85857c9a33eec63d0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZWFT2497004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb570fb05df03022eb4fda499fb7ff3e15b236ccc504f2a9fdb84b04a28d4ce9f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFT2497005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf010aec587f187eba671492e4a3fe0d9bae3b2a2ad1db56950a74384b3927f7a. 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/QZWFT2497006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18305467cb2c37abc98f841b737747059251643059adcd6b03969d6ba7afb29c. 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/QZWFT2497007.