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 0x5fff11ca95f081cf346a95158009ccb91e90a0ab4735040305f4bc7fdf005bea. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea2ba602-3b1b-4bab-8f97-15899a59392d.json and https://artists.proofprofile.net/proofs/artist/ea2ba602-3b1b-4bab-8f97-15899a59392d.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 0x386d35965aac2c2666a83cdd7f85527d7f0087e69ea46e9b323cf639ec257571. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USCGJ2541800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c492f1c3174881ffc1c433f64edc7f703e1728e1abd9ccf1daabf70134960b6. 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/USCGJ2541802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe39b02751a337dd83f2b18fa0ed529fc9b67a4445a7d43461aee550b11a2cdf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGJ2541803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f397b54e70d1104f61130fdefd902e51c75c80690d3c028b53faa123b15bb9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGJ2541804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4582d0250679c11f32b8ba3a42d189782c83cd0909575cd03bcb8faa2dbd6f99. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGJ2541805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8727451283e00a69bb51faeb3efb53d2d89b097ca4f986a1cb0298d40a3969. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGJ2541807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d639782e2c26fb95c4411a252edacdc3f9627ff5643fd719293ca57bbb88d7. 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/USCGJ2541808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71671a6a2a823dda6c1e8e04f3e1501452773a4a80c22b42de6aea3f20fc7b1d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM92406371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f0772fa1c96848185889e17bc2f18046ef936255e4a58e8e3052c00083ef84. 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/USHM92406372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbcd67f387309fff2e428a461ed5db92b9a9fa37fbe12151059515f1b6bb5a. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM92406373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff90fddaef5029bfdddffeabb451ef07c7b6d73776f5aa98cc212f81f0b762f. 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/USHM92406374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2527188d1a2077659b9ddd964d3b96b1df549d7531c9b8c7f5980cb83cebea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM92406375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce2971ddfdf87061c8eefe4c9f203505dea7044cb43371c92715ee4de56ae6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM92406376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e595d40f7c14f18b75ef24377a2b2b491da71d3bfe3c15b9399504a144b634. 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/USHM92406377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd4b3d3d1c9825e3699348bc509a599f8ed6dbd7c7813548b435e1415fe458. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM92406378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd5eca7f807c441296cf3d9489af4d219f512bd8f1d70159d6575a5c07488ea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM92406379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e79597adc284239132abe4d36886fed08b77030ea0df6d7ddfadd129d79d03d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM92406380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe4c18a02bdf1d4bd2d69c169847b1b2e2b3de3bf16289ae7401c2c4017e2fa. 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/USDY41838667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba9637d9c3be7676b5e44a6244ee01c28c25abff6fcac0ab732951572ae897e. 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/USDY41838668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f69d8a57a91129238dc1e89d044c57a699265b55953d48e96673a554a49319. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDY41838670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe788c52ea65a15db47faa8f8db45ca378de0e75044631e1ada7bc4f5db4ea882. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USDY41838671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad1aefc4e6bad9e2a75782ed3d49a4ee71524663fe988841b02502f91019f7f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY41838672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c881d936ff933c01d80df02f5d6a06a93a2d7c49471ff90f64450fc6ff07ae. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USDY41838674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad961d9fed5f6234fc07cb11ce05515179f2aee1e2fc69017d15f425f25cba8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY41838675.
Sereetsi & The Natives Featuring Mitch Grainger On Harmonica, Mikael Rosen On Drums, Tomeletso Sereetsi On Guitar & Vocals, Mike Mokgatitswane On Bass And Kagiso Nkwatle On Keys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed0903cf7f206541d708e69447b8a4aa0d460c716d13e322ce1de1528f5a55. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM21607426.
Sereetsi & The Natives Featuring Mikael Rosen On Drums, Tomeletso Sereetsi On Guitar & Vocals, Mike Mokgatitswane On Bass And Kagiso Nkwatle On Keys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8e8072fac5551942ce7f34bd78d69f87d09b117491aa56a26501e024d0c84. 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/USHM21607427.
Sereetsi & The Natives Featuring Mikael Rosen On Drums & Strings, Tomeletso Sereetsi On Guitar & Vocals, Mike Mokgatitswane On Bass And Kagiso Nkwatle On Keys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dc12e5f5bbc6094bb531afcca10cbbdf5673d282e162224b2fa774c0c867aa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHM21607428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe2bd6c08de1ebc9b28cbd11a7fc618d97eca3e278a527e513634945f677d7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USHM21607429.
Sereetsi & The Natives Featuring Mikael Rosen On Keys, Tomeletso Sereetsi On Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2d596425d1fa63f74abbb9d3c228f946802cad5d2212cfd8ccff4df9182776. 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/USHM21607430.
Sereetsi & The Natives Featuring Mikael Rosen On Drums & Keys, Tomeletso Sereetsi On Guitar & Vocals, Mike Mokgatitswane On Bass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10811d1ca1480031669e4e8e39cd7596179b75df0b82f6b9e579ed0802b7238d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM21607431.
Sereetsi & The Natives Featuring Mikael Rosen On Drums & Keys, Tomeletso Sereetsi On Guitar & Vocals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30bd9c033d3def16cef2da61956e005c788b1686a4ba91bcd79f0ae27de4a8f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM21607432.
Sereetsi & The Natives Featuring Mikael Rosen On Strings, Tomeletso Sereetsi On Guitar & Vocals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aee22267175a6c791f5530b28837940148ccf5f51fd135cf404803d259fc22. 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/USHM21607433.