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 0xd2950eb9798a8d0bf564a6aa7a949189d0590f4ce7b7c40dfba2614950204cec. Chain 2 (Bitcoin): anchored in block 953843 (2026-06-15T22:27:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/004fed55-7407-41eb-ba47-cd1af5d5ddde.json and https://artists.proofprofile.net/proofs/artist/004fed55-7407-41eb-ba47-cd1af5d5ddde.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 0x35f03ef1d86cadbdaf28ba99b4df739442e1a29e12b2f8c4e01f270e4785bc3a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWU2453485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ac205f74aecc8b1af1666759c740a7821edc26a73bf01158de8e6a86ad202d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2567548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bc05a5e3bd6b16006a70365ea38c9fafc6a2df1704a9a406b421f42d25739. 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/QZTAU2567549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43fbd72f8db9c8bcceabc2b6fd8f6289370be34e6d80005cf52ca134ba3be9. 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/QZTAU2567551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6847c01dea7b28388217f3b6179dfb5c4037710a75ec46c3b533092f895477. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:43:43Z), 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/QZTAU2567552.
Bombaclat Skyter Kidz v.7 umix.wav (Normandie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd83afda2a66a01942114ccc38ca0c9f44f10769a62bc2470bf79cde4264f6. 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/QZTAU2567554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd6fd12def8b01bbce1bd0dde75860197b9091aa9384ec3298baf27e6f78d1. 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/QZTB42513717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc83a7d7bc0df332fb14c7d8211d8da3087a11b327b4b5105162deb4ec96966. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB42513719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd93e37130b3f3b4c308cb6c471f5b5080c12bd6b3a85c4cadf9532e9338dae6. 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/QZTB42513720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c0ab975d3eb863bf2928b2fbca232d2426de675f18003bd902a2d9e6d98591. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTB42513721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d18d0b1f59bfc05eda21b47ca15915873f3f8536b46c97b943873c962a2d3a. 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/QZTB42513722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2499a4f9c5bc14a1cb8a82b38f287c98db26c773e64e0684981d2501c18cac. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:46Z), 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/QZTBF2568205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2fe9bbef3b0f274516128d28da9fd578bacace19a07c0d51cefe2e00f0bda8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTBF2568207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100aff4f2e02d8451341a408d1830b5c944025ddfa62794903d6e342843ef6b4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7Q2540767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc87c5e85c775a6263a1aa3eb0082e9951c6f742f02014df30994b599de8b10. 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/QZZ7Q2540768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd300b987f1effbfe78b702a2dd47cc6dec06f071a0a9459750c9c1e4393dd6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2540769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe073a7ce27bf5e70cc0232480d6abf61ef248785dbfd137ef6994aa70b94b530. 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/QZZ7Q2540770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee5fc4f8112b4b97a685c6f4dd06c808bc9eadcaa7f36c80ffc447d502e8670. 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/QZK6H2595822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d6ce8c15dd3e285d9fd15b4f5b5aac157ca4f844052774ba2383bf42e66079. 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/QZWFQ2492514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4549879fb2d65e73475a762c97881dd1c4cb0d83b2c17f1f403f5350f78af7. 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/QZK6J2531812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf749f46486130aa8bacff991df8bdcb5f5e1247d77fab1af521ccb992ed9b06. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/QZMEP2527222.
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