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 0x183076e1899c58e2481c82975b18fe1687da835d280b8e131b1143f8752aa38a. 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/ec0c37b7-2cb4-4cc8-96af-b55178db40e4.json and https://artists.proofprofile.net/proofs/artist/ec0c37b7-2cb4-4cc8-96af-b55178db40e4.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 0x3f2b0dfb8e5ba57e4e851f6912ae8c7b63ca2e3441020042c4142263c936a919. 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/JPY392200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04990f646b012263009d1bc3f411b72c8d24e6d544000dcf788abfc376e4048. 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/JPY392200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b025c516117c186e26e53f74902ec0ef3739f394d645b0f906fcb33e05a418. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPY392301423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dba92fbabc3c4b84c7049e9892a44417bf27f5fa8a189b24912082734c4686. 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/JPY392301425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef124b18f3a062afbb1c967a111954bab64c62f7d963942c6831b391a911ed. 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/JPY392301426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae95d23ae6fe378115e88df992dcc4f3f369b02c268e167c9cdfef305b6ed58. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/JPY392301427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842ab5ce4dece3b31387baa999b34cf37e33a5a97254f61ce7fd4b38302555a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JPY392301428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89217456268e98435f0501feb8cdca0cc03c5d4344b7d4cc7ea54f743faad9eb. 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/JPY392301430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db33c6638ba1ae1fa0a80f6facc5796b4f241765dabbe3ec306ff7576b861d. 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/JPY392301432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8c95069aa6cccd369b42cbef09b9be0ef900669470403d1749e93fb602a51. 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/JPY392301433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d296b839000d03816d2a3efd2518ddfda4bae06bee5593094463aabd08959bf. 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/JPY392301437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d8ee79215410ea545ba1a9a63015adaabe13b276151309339d89b73d08cdf. 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/JPY392301439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf06ca1f05184dffe9da364e61b32675695ac02f0e9eb21a605600e29c8164. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPY392301441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d2302c56a4d06a87bd307926a3321b6c3a06e0b562cfa737d23034979167e. 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/JPY392301442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6491bca3025ea3e8e7b6bd9d5f3561a583a446b576638fc802d8455dfe898. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/JPY392301443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69bc66eac711d39e7e733b28ebbd029b20bf080ab4deb59abe2e6353d70ba1f. 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/JPY392301444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6abbc59f6afde743bde8014a012918d1785d57e289c83b0c4ed840012eaf3b8. 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/JPY392301446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5449798f35af98b0597daf849f1bb3a362786f4b4bb788a5da8df432b6463c4. 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/JPY392301447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4367ae1935ad152bc847fbef643be941ebe21deb346dbdc12d8cea9711deb. 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/JPY392301450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe936dab59a2682b2bc881f3f583d9b6d461068a0aa39033c82085d4dd753a1ac. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPY392301424.
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 0x12afb044b8c675de1d96a2d495ab458d16fad01a11d057a7097fb991c44c9db6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPY392301429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8351e3209c6aa1cd6ca43b1fbeea2abed1ec6c6661948a61f2f9df996d79615. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPY392301431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9056febbe52b120770a57fde92bf092abafc7465f86cb8c45e094f0a8a2e36b0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPY392301434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5e72e48735afc0465aed0c16b7c7dab24cdcd0cec7e371951aa1f42daecf6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/JPY392301438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fec55900518a4dcaa364188032042ba4badff89c29154c73c9b000f928833f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JPY392301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea1b19731d3686e3ea691795e620dc50520f6d6a482e50a9f179e85cf9de997. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPY392301445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa734f85210aeeb4e23e9fc779ce46221654435ceaae8e5dd9cb134dfe71cf64e. 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/JPY392301448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17ec9224a5e276d8ea4f7c0941b1da29f921b2f0e6509b7dcdbac3cbceee859. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:03:11Z), 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/JPY392301611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce21be5d7e0d54b4249ca7abbed7959572a91d7225cb42ebdb2a55dbfcccc2e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:30:42Z), 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/JPY392300940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa18b0a9304cc39302c4d7e271b0c3069a08d4ff7020cbea6915510f9c25c1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPY392301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee088712bfc7ec7c23d9b65fa9c91489fb90967cf71d7365988c90a03875039a. 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/JPY392301609.