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 0xa87eab6720016285eb65c7d77071c0bbd72acc59f874fa2fc1a486872090f3b1. 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/7ee804f9-5dd1-4a17-8d7b-82f22d761668.json and https://artists.proofprofile.net/proofs/artist/7ee804f9-5dd1-4a17-8d7b-82f22d761668.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 0x083621ffa5d82b4b541c26bcc5d475882f1cccd29798a13cdf18cac8838cb607. 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/BKBSS2400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f6358ac094e0a565fe5b1bb5b00722d82dbc16471a9de474a1d5c54f70080. 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/BKBSS2400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2cd16316e9aa8dc0db15780aa26b75d8baa9ddd93310f1190db1269879afd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BKBSS2401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b642c3e95c30c4d69d78b95a939f8ac7e210a96d0b16c36d580599977abf65. 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/BKBSS2401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b391684e4a2a22e77a77b5862bbeca1fde883665d839994e114c97c3cdd8ce0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKBSS2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112bbb219104c7ae10ff23a35f9e1f937ca7018367fd4163246c365d353e39fd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BKBSS2500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb81cbb44f8cf9009d4b005b12a89b20495123d93a22fc76e66f1b1c076c24. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BKBSS2500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35764496faf1a6f644daadaadf28193a4a5ccc5e742eddb5ddd19e6d4dc5c5af. 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/BK4442400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd6c3561f3baf5f51d671a033a4714f74b85ae893147538ee003a21d884df69. 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/BKBSS2400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6a8206f4499d728a04368d2b1849ac8ccad4272985d8cb886ef8a03ad63333. 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/BXG6R2400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a81892e28271773f54f511d5fa7ce312c13aeffa1d424c8ac92e08c4193d05b. 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/BXG6R2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf133a659c1fbfe1baf92d06b0b51cb021fa4f8b30381e58d1b68c946edcf6. 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/BXG6R2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b17b421c434d821e96bc59665119ecfdac429073d0ef0a29a13c5ebb388ba7. 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/BKBSS2400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575b117cef89fad02e396f4bc09acc86dbcecf984d74e90d3f7256aaba7346c9. 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/BKVXS2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b699a1ebd3e69ccdaa9f7a62c9acf1ee8a639d1a878365f8a87d91fb0c993. 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/BXKG22302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe332dd8e58be26824482c07ac52ecb7aa3a185ca772763a62ebafd4ec3e2d8a9. 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/BK4DA2513633.