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 0xdee827fc3652f635e7b7d643e1b0b71e99bc392b960a9413b00abc823707d356. 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/0b221f1e-a40a-4144-a44f-120bcb92916f.json and https://artists.proofprofile.net/proofs/artist/0b221f1e-a40a-4144-a44f-120bcb92916f.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 0x0c0ae5e642fed7318c3b9c43708d9f5567634fc5d3da74b584f1faa4674e9f15. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ARG991040540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b5fc8fa9f17b5e71d3d32cf42b11d7b5148812a700adf53ec4cf7d69b46248. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/ARG991040541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26c81ecd18cbd1e05d8d8f3427f229a24b94ab9301b31ff792e5f379db56d5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ARG991040542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72af8389195dd316f59cb360af583be871e8bbe0a23f0bdf24e213eac01258b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARG991040543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b321fb4a2503ac3a089a387f7a380e0fc116c885b1185e9e27ea70d369b717. 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/ARG991040544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a6e6db93fdf45836c3cbd5591298421db546261907f55907561269eb233407. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/ARG991040546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a2277dd7cad8c6370f907144a9958a2a068e6a235bb31c329ca634b628b556. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AR8L71500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9e4982d258cc9a79e69a98d22e32e076ecb49c6abe3ecd2dc36159daead7b5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AR8L71500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7792cae5a8a229ec0ec7af3f45e7cb232c5f05a6dd7b6725a6d677255790aeab. 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/AR8L71500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd987cd2e4bd2cf7ced7c5a94f2afabc19be4516fc9797f52ccaeed5ee3c280. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AR8L71500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b32d816f561c138597ac2f2b0c9a79be6cf4e1859319bb616313596c6fa396. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/AR8L71700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc311a70e3d87d2768fda813feefa99e1085d64eafd7276a17236e0d9afd8f. 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/AR8L71700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bdbcbfef9be105418281fd2f7d474d5879761e11369750e060e81af95df026. 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/AR8L71700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e5304d049d8adb2290c8f3fc0c258ec56c031aa94f4f28fa13bb8f3f029fc. 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/AR8L71700144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dc31279803f72fec7465a45cee7a1d9ed845ad20094488558f2f429959c7f0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/AR8L71700145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d96bcf9cdc506488e6193a303c80a22bd84a66d4cbf8720701c7a0929a7429. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AR8L71700146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc5ce8317fda82bc5cd3ef31b2505b5c0c7cd68a9dc6958ab87960c4cf29ec9. 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/AR8L71700147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc27abcf88563fdd2205c64bb274e1f30cfc7837ed75a13ac1a167b051fd930. 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/AR8L71700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89953616c25be13a7f4d4448f77573999a162d73446aafea2a0f21b702de8d84. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/AR8L71700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc9ddc1f7deb3e3f2667fe3f42cd9f71af675cd1ad86968d197b47d92b7602. 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/AR8L71700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91972f65d417eaf34f84ccf135b6d1ce41a16aae05dc98735e6321d5ce2588b6. 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/AR8L71700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09776d013ab8eb2a7c9c1a92459447183526e266f2d60a8e5cb1b51a3d8fcf91. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AR8L71700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c8aa7f03f1cb83da3d66ea1d32ab8a1f387b6859fd3aed5c3f5ad10d576be. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/AR8L71700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12578fa70e75eed2c8ed2e7e0de64cbb3b321d417e1ba5f6a6fbcda71b1310fb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AR8L71700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b8a9f971702c6cd0618bcf4f0721def8d8b73b86c65217d653250cdc324332. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/AR8L71700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3d33fe23301ff667427856399579baad5faf1dc8c2299ccf885c86430bfd76. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AR8L71700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf6bb54dff6e8875fa12ec8fb6c46130fe91c82a9c903617808497c6026c7a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/AR8L71700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b9ef287b90875e57a64fe70eb5eb4b150acc14a96d95f552a3d2b54074b881. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AR8L71700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf15f0e75e110187e44b4a8f95a1b90af1851c8cbcae2ec2c4a9bd0973a67e5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AR8L71700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9a033e9a8810191fe5af381d09c0501bb4fbe8802cf28d8c1eae6f1fa49d5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/AR8L71700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a8c487358c03e8fa23b265f65b339bbe537e264f0141ca28c486a076c14f0e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMBZ91433271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a00af503ec4a61be637aab57930005826e4f4bd654ba21b632f56b8d86c7f5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ91433274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d251fa9cb1222810e9d7136400c21690876bb9a6c3763cd39b62e3de3831540. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMBZ91433288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3439d33b1ccb93cb83d3fbb32a92ba8fb6f17312f16ecff05897f5e3559543f2. 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/ARG991010465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee8a1b46fbc40109a32a6c3f08c1ec3cd24a72599f44bcd72eaad98fadb1cd. 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/ARG991021500.