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 0x461a12e732a771ba0286fbca55ac2cb2aa442f548190d11ece7dbf7083c82231. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaa8da7d-bee7-43d6-9827-a63f05130e67.json and https://artists.proofprofile.net/proofs/artist/aaa8da7d-bee7-43d6-9827-a63f05130e67.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 0xf363f96f7e9163dc32639200b1a95c825e25a376fde358d2dd70f30af9bf9a1c. 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/HKG732445720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866eb0d5d0a24f141c195ec97a920951c50350b81da24bc991215366713f1f0. 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/HKG732428913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfbe1b97f44b73661188e6bcc11290956bf92d4d9f324f90fd14182f8504233. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/HKG731684987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5309b7dd3c0b57e719b650a0cf4bba3d0afe010a74907a3a76b1892f0022e6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:03:30Z), 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/HKG731682740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42f6bdb4ff6da80d5b0ed23d63e8ce77cf2e1b26ccb7cbf9508b0ed3c5ac23e. 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/HKG731672879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cb1c238e9266f47055cc9996f8151476e612f5c2f20960497a0fdf94362c5. 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/HKG731648707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ae9f5e16f5452cbeafb2f518a04227a569e6a037f3b8bd1ff4f19e5f30a2a. 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/HKG731627497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4124741a6b6e15b108ed4bcc81da5b0f273b1b0648eb1049d8be74d1c093bbd6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731627498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7967b3c69f83ada3d189b31b6fd909a0b055ecb88e2f82fa3ddee56066bfeab0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732382967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686dc15ee0715ec6f8d11899bb62fa64c3b2d22539866ed50c65b7a0fe004bbf. 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/HKG732382963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8ea69a0cc62512ec9a4b98243cecd134c80139e1431843acd16f53f3a2ab1f. 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/HKG732370349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e706c8bf7b16d11d9a9039076a0fd237372121ff6740942c1d324cff7a73f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732370350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c6b18a134d6d12b0098e309cd358ef751f5bd17ae4217fd17c7d9c0511d88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202353280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d03b84af47bb6ee5a1149f6c37934604f49a0585b7cb50773b560c96bece0a8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR59R2363035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6322a3e594c906b19e8dfa50afb43f5ac3546e792933111bbccc75d5caae26e. 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/FR59R2365369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573739d9edbdecfa51874938ac0fd4179e3843699704b9286776ba2d8a75ae6f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42383365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce30859f6ecb31ac44649018dc19a92fd0f215f8c4a230738fb2aa2af471c3. 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/HKG732300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd0626667def8a7d7cde65ba4f4a78897fafcdcecfc4acae1f83046337fc908. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA082297101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13532eeedc76f2b886cffcf5a06c38c8af44eaf7dc46887182d556429a77389. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA082263655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e039256a4588268eaceab9d2c4e9a8fa3c548ff9c34d4032964d7102773400. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA082225367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d56c2382556071c7529308e6da2d3f450838c5dc40baaed89f427b66caa763. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA082230175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb55be5eca22a9206a2d9213c27849188acaccc49c67ae8b0fe70d92a3aa47a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA082230174.
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 0x2c4500cfaec3146611afc97c3babdf25b8ef40ae83e7a58c50da641a8a15cc35. 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/DGA082241939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a45dc2f1e217414d1ad235de6750cbccf80fb304f44e8313c6c0b9633b3c83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA082213445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893324f346df5a5671cc0a83b646e21ae36fcfba99698f699011e4b6c98a76bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072226244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dfe52b68ccba014df7ca3d56ae2e5a1cd41eaa5b126c5517af8cdd22912825. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA072219578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a599b68b9aa8ad4fdd54f9a79eab79b4edf819270957f34e017d3218fc5c92c. 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/DGA072219579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd208e95bec153d75687648fcc9427e63f4641be6915cd7b5d5bf3295166589e4. 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/DGA072241890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dee5dc319a44b60c62a1100d7d3cf94bf879e1446fff9c3ebb88178482e5185. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA072266558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11281bbd470230ea33c11123984a1c1e7344290dc71cdd75fe8511f29b5bdb76. 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/HKG731400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b7298dce432fbe32d940ae3e59af2c4b21e505ba5865abfd86440644f5121f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732495342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cdcb5eb3ee3f6fa17f44b961414f0a6345f3d3a35ed050599d0e3d4cd6e2e5. 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/HKG732495343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea7a032deb00b93a901da58b3df1bd6156b379861f25f16f2af1fcc29f917e. 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/HKG732481377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fb5bc1aa432e9b78e2e01eef595ce068760be0af057e5d8b42d819c5b39271. 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/HKG732481378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58136c93a3ca22104852bfb297cf4720c3d5fc6317316a2f884bd6e8dc99c308. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732463032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985863dc89094ca4be6e54deb383ea55a1adf69df2b3da672d9015c5c3b6c196. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKD012343759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bde3f6949fd595c5c4122bef314fc1e5a8eff0f986dbc915cb15a977eaef27. 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/HKG732450450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5a8489cf002b8b69e41e44fe4dce00715585995574e191a8c7f759e9f20069. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732453524.