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 0xc59ec7f6f458db3e9f26023ca9393c79eb0e46922b2ab7ce97354686586cca02. 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/41437ead-6558-4fea-987b-dc30e1610773.json and https://artists.proofprofile.net/proofs/artist/41437ead-6558-4fea-987b-dc30e1610773.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 0x7176b02ddd60859e22d6e6aa3292441fa0328ae2169ad234431d4198842661af. 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/DKAZ71513303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf201f0ee84adc562e479200646371346f86be2355912e8d4403f463d93aabbd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKAZ71712701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd754f5e7fb951ad8020db98a5e31788f7f0f3145afacbba1c266285173e63f1. 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/DKAZ71712702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad713a8760944c0d08126bc12f17721770f2a02d9f8d9591723a4daa63a70e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKAZ71712703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625eb887eef8d37119447b9297f32a5efad3511ac4389a9faaf49887832306a5. 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/DKAZ71712710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bdebab2e50f4f822f66360279336f66237d034c07c33b056e960cbb3682b2c. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DKAZ71712705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0792a5119ec7ff8dddcde2c8a90905257299a4cb16cee2950a2a7008bf344e02. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DKAZ71712706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258fb374d84785e87377e9d57cd4df1e2ea9d3cd9baf7a8c3639edfe5a84f663. 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/DKAZ71712707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff06c53b0210083e23a34aef9caef0cf161783501628715040ff9b63a2391f8. 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/DKAZ71712708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b87c9c9e54086f992c5d1d6745c86ac425d5e52d3457127629069343e6328d8. 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/DKAZ71712709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd4b0ebd24a46af6cc6164b9c6c79f1d83542c3d7a4999228bc26e3b68059ae. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DKAZ71712713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970fb641b1236ea183ebf0ab8710250efe18a93859ddf5af8be2b6664e3efe13. 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/DKAZ71712711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff06c53b0210083e23a34aef9caef0cf161783501628715040ff9b63a2391f8. 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/DKAZ71712708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f13634130ae15bb26660c669d32d13ddea79d81ba5f3d284c0e29303b8f7362. 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/DKAZ71826701.
Portofino - Kenneth Bager Alternative Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5590e22413b8464bbf1dac666f8c4d79bf9bf69006a9722fd0854afcbfa09. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKAZ71826702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb505595ac8d31b950f63cb3ce975cbccb5ec7a5a671604c72c97919f8375cbd. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DKAZ71814501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbca43d11115c5eb6e6f1db9cce0f33fb8b97316595a133561421f7a5cf1c98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKAZ71814504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace9095b32eef6bca47db004e91933c1cd92ae9602003e46546b01d03f9abdfd. 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/DKAZ71814505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f13634130ae15bb26660c669d32d13ddea79d81ba5f3d284c0e29303b8f7362. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKAZ71826701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fad51d6d070e09cfb6ac831c0f85c2f31d4677dd3a875215125ef28e9dcafa1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKAZ71814502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03bf98dbb60e9cf60e6e7607c2bf532e444fc139c97f9de4a0c566ecba11e3d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKAZ71814506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a856daea9888907c97dacd5fcafd8724d96146e3be0cc3bbb19e651545f18a. 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/DKAZ71814503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa50329dde2b4e4aaa9e05f62dbbf3ad0f9ae235472a5ca4b4aff1734b076f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DKAZ72020701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e92c0d66bc914c040ae09ebaf859aa776748ef3eb0819416d266f0da59b8c3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKAZ72020702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b71440aa71d0c76e2ee7d896e8f760f89a98eb4816bf5d67f4f6cd6a784407. 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/DKAZ72020703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9d3ced2f1853d24f9d841b41a7b26128e1bb0a32d22c9885edeb576dac3a6. 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/DKAZ72020704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b1bfca7f79069bb5b5d83ca3ca3f08bd2da598d38f2b2e024422c7cb71a3ba. 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/DKAZ71920701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3b1182699b47cbb57925ae1ce3ddd9a8fd4e18f6fff8d39476324d77e7188. 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/DKAZ72020706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acabf434d72980fcea3674c2219eaf20da638df0f3cc36e8b46c496556af608. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DKAZ72020707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd167755e609ed64065038731a8e2c226878fbdd785b43ed85bee48d69341266. 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/DKAZ72430702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef825a4c94a5d4d416de737f1b09a85e24afe89974a3df185937f3835080e06c. 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/DKAZ72430701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80af70229bba1780e2b3069da2ea0c1c879a6e4586263c478122e4acb612a43a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKAZ72017511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea9a06914214a0147b640db3089f955bdc4ba4a44b7c98d86484d2da4c9b8b. 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/DKAZ72331601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb56a8beb7bf48a7f48e72a8a4cc623acb2d70d1e9e7f26d3a5dd5a247b5022f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DKAZ72328709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce734bd2731b382c32a43ee921d8439ee371833b4f8870e506d54151c6c60c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DKAZ72328707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff06c53b0210083e23a34aef9caef0cf161783501628715040ff9b63a2391f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKAZ71712708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1da0837572f5d1188836685e259c648c722b08a751ff033d1660d16f873e62. 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/ES8741610105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed78de75575bbd29d62a5bdb623fdcbc6f412fb5bfd8d63e659d41983ef84a39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEGE92200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef825a4c94a5d4d416de737f1b09a85e24afe89974a3df185937f3835080e06c. 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/DKAZ72430701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366fb5cc43f63f6ba5abe1220ea6e1263a33b3e4c004be95e428b92c5160c9fa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DKAZ72329807.