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 0xe7d8dd228ad6729b81759633e88a79e9fcd90d9e754918d4669c0cb66f5f242a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3ef2954-cfb4-4b99-b4ef-da4f07552d8c.json and https://artists.proofprofile.net/proofs/artist/d3ef2954-cfb4-4b99-b4ef-da4f07552d8c.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 0x07ee88fedde6379f186618a728c4000b14ce97f6f45f32d34f5a084a096ce323. 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/RSA221815099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de96b2d4d1bcb8b2db2968444c38c2e8085370ea7750f211a38a5b658a2bc9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RSA221815100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a94d75fb2bdc2399d9c8953c043bee68b46410de710cf717e6273b94f173c2. 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/RSA221815748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a557182c5db0cb8ede06947a0250bda4f777d5c53247cda04801e7de9cee2f. 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/RSA221815749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7fe4801cfcf9d330e2c074e73fd28747a383084ccaf3c9c5e22cb63575a02. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RSA221815752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67dfb9761517d0ea0cf23693c0438b2f7d184300e15d015acb0acb65ddfc02f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/RSA221815754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a13fb94df40750fcc260ea1ffd3b5ae9a10e0c622134bb937c1544b450849. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAFN2159802.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8710f610a165d2ab9563f367534053b33bd76245a426b4ea6963b3a8e7e4016. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:34Z), 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/ATAJ12302524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d916c87bf838a1fb31680e347abc0103e200ad38211d835601dad03e0660d3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATAJ12302525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a6fab917b3fba2e8125b9e16d9fa654c70ff154cb31c83cf45a2ace13c184b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:04Z), 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/DEKB72535423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a586b3fbb3de7d05977236508caaf908243f86fb0009a9dc5205e33a8800c4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEKB72535424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf166f96d6b8e2d9496a36b130b4b71721466ce65dbbdd4443a76ab1f5a484bb4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:54Z), 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/DEKB72535422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ffcb34b7860aff8e1f18d12b5bb2e08e4599f34d4829d50b7cf0d80aeec173. 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/DEKB72539178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fde0a5e630f2f6e3e8f5c110784ce732ecd9c36b6a30480b15fcacc34e19e6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEKB72545815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b9b41dabcbb4b1eebabbfc9cf3dfb237ebaa0df8f481cd7b32fac4eca38f50. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:03Z), 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/DEKB72551698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad9224931d90e26a0e18850cfdcd236ff26637758b4aa10a20785bb53ae2a51. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CH7812551266.