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 0x004bf0837b63f7ce1245c5a4299ce3ad7b52993c06e98b87d052503ba108c7f0. 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/464a327f-72fa-4577-8c58-6682005520a6.json and https://artists.proofprofile.net/proofs/artist/464a327f-72fa-4577-8c58-6682005520a6.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 0x50f282eeddc3cd5390728cf83a28dcb698b548af4ca0689bf91bbaed5cede258. 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/ITO172240674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b95d2b5ef7076ef44e6b7a46fdcab47cce153322219c6fc76d8cba42e6cb38. 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/ITO172240675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d894cad1a5ba5a01c55992f32968f99edb7b545f78ce3fffd061a8015a5dc. 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/ITO172240676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c083bbe6747ca1ec4acb28074fdb495899678299cfc45b4f65e720790c7f60. 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/ITO172240677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccfb03a5971be8575fea3d832902ad111ef9b1091591d6de234fc4bf5b84442. 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/ITO172240678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4000d247ad9cf89dd2fc5d79f20e5d86adae4f79e350efd9c95853ae8832b41. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITO171540078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bcb37f07ca03b1811f93841f7adeefae2c32ba60298320ed4d4c128afbffbf. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ITO171740049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f73c49fe61fb914a851c19c9ad3522bb94c0d37e794e78bbbbce6bb54d4ad47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITO172000297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb047fd25f9015effe0ee3e374819e5a2696d8147989643b851bcbe8b6be8da14. 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/CH6541765867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb656bac33f7bbf4b5c341350a93252ac7e7f3e6a51325b47a940d98241c27f0. 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/CH6542136110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e54e74f17069325edd8c76f670892b653049f028cd3eb2c098d3de1018f0d. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/CH6541765852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72cbc84b3b54cbe77ed08777ec74467b44f80e4ce3b2dcb83de92db434d0949. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH6541765854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3a14aa0007e6780ffcff67ad9c7e85c44e8f0caf0f3b1a8d5d18f3ea672fc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITO172240545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18abea6f625b4b031b08ead67845b223b9db4e75809bfb72d6c824079820182. 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/ITO171640048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966bafa4d4482d6276cb527a043a5277ada58a2a25eb49ed739c520f4cbb2170. 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/ITO171540014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5ff2a2528b024b5b66b7a0e1fffb69d165232f164f911c4a78559f3393ace. 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/ITO171640049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052684f314920e5b4ad6b017152c8ca7288835f8dac33db6d4879ed546266b8d. 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/ITO171640052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5bcceb0cebe6dbe67e29c48780e477ba4b70f8fd61c78b1f100a0bba79107. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITO171640055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e703e6ee3917a5c81e4896a4e4a16d8a8b99e251ba6af3bb5d8ad0302a839f5. 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/ITO171640054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd0eb95f7984148a15e570c890bb66909946044bfc5118487ea4592445f6b87. 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/ITO171640053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4000d247ad9cf89dd2fc5d79f20e5d86adae4f79e350efd9c95853ae8832b41. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITO171540078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3bd6b7e41d552294a31e51acee9bb7c933d6f6f9c70095ee12e759d74c0dbc. 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/ITO171740028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f79937003f12b6dbd789aebaeddf55c0999e255610af62974217a552e29e35d. 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/ITO171740044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c38cbef45e0a6f754bb0cc7b64df1d350b483fe7b47771b968c3e3fc8a182. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITO171740037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7307977174b79e5a532b1c3b142cda862e71d078a3ebaf41281d421a6269ed9c. 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/ITO171740036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39312bd95b23b0ee542faba601cee6179fc92f9ed906ead0db0345e265c88718. 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/ITO171740030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bcb37f07ca03b1811f93841f7adeefae2c32ba60298320ed4d4c128afbffbf. 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/ITO171740049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e12ac3a294a2381b1fdf254c50b9617310f2fa70d74ef8c3fe920581ba6ed. 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/CH6541765861.