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 0xfe20a9bad8f546918259df1081a6593abedb6db987aace6fe83432d49c66414b. 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/2fcf22cb-c1f9-4246-87d0-433c6a6fc9af.json and https://artists.proofprofile.net/proofs/artist/2fcf22cb-c1f9-4246-87d0-433c6a6fc9af.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 0xe7b63b41e3be3db3eefe4e5ffaf2879cf256767c4f497c15e7c05efe286e4a91. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82448754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba03a54f8c89c6898475b8054641c12870dc7985a79b68638c9072984b0bdb95. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82448753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7adead1ba77d93de09321eeba5ae9e53903a88f24c448673be13f32e6d775. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82448723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0b2d1962a42b2fb7207786ce405c04c17db5f7499690f426bf7e10b6d84f79. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82447875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a060fe63fd3474d67baa910262037b2aa74bf73535ca7a8464e9e274b7099. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82448444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bfc91f4e1f14556c80d634ed739673544e3d03813050598daafb9e74d65796. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEPI82448805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268e51467797c0e92060c841b48a6ca1d3ad0ba3319bf80eb12f8a0edfb2184. 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/DEPI82448807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94bd6019c7c7a88dbd0dd24e339818fbc0f75d0590d74512be2ac38154eace6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:32Z), 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/DEPI82448806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7bb1f93f26a6b091b5185e897f171d7d78ab9218736f02be3feec19290d11b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82448808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb980c30524199297aedc8cda8c45684b1cd7fdd7c18bb84713c61fde047100d0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEPI82448804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e7aaf607d2002e797fca0fead8a4c698c984fe18caf4c8f4ad4d11182fb8a. 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/DEPI82448813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e13fa174555c37032a3f9760f7452641811bac26f476cacc0540b8eb289a17. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82448814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054b44d7a279df57b2595b8e47be0bbf95c8d03a4bdac4cc3f60734dbaecfdf. 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/DEPI82448815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bd37f2827f98893f904e230788772e11e56ed9bce648ec3b849b2b2c07933. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEPI82448819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed22567907db0efdb6f5c9617b3ea1c79edd610ea94238c201d1322043edb482. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:07Z), 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/DEPI82448817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7321be860fd84f9f1a3dfc2a9db9f3ecf3e7f85756ff41c733c7f17be847310. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82448820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847894c14a8e6ba807aaa735e4ec009f0391a98174c6975b5ae6f61e28c25298. 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/DEPI82448951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1060d7ef9e347cd35d9ef2a0a51f8a08691cffdd18b93ea2d7c7f094754f5e7c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82448954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5595262d28e4f1a824111d6074bd0b46fc54d4cae1326c94fe38d54cf084ca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:15Z), 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/DEPI82448953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a296c21dc8b4d188ffcb6fa6c4fc7709a788ad48ffb404b59d7ea7fdf58c3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82448957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a96aeb79f1c0a5e7985575d0c3cbdea0587e642ff46a24d046242044a6f48ad. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:28:44Z), 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/DEPI82448844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3058b27e72614721c2e9d7ebaa1ffc1024d902ad338724114bb7ec307144f7c7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82448969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714cb8812358b57af74abc62deb839949528444a7569e092f104834c8a3f0a6a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82448956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879f16cd3606e6c7c356c32b81d20fcacb117693f695026e00839f195c86f95. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/DEPI82448961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8d4a92232028c97c50ce7be8bc4328839854216f87c29a9665ab8b1850462. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:00Z), 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/DEPI82448098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03da9c5db4b98fd67444f29f3adc415a6504e7a435aecc6bedeeeb9cd4267e13. 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/DEPI82448846.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f1715c945474c40fcd0a3f05fc17145cbcffd0a9cdc80f226f02fba0ab0fc9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZP7F2557754.
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