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 0x49bdabaf9bbd122c5cec029ddc2d3f75af88d23774bee9e6fb1867056063e560. 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/c982e50c-526a-4776-8e8f-da088a5ff37b.json and https://artists.proofprofile.net/proofs/artist/c982e50c-526a-4776-8e8f-da088a5ff37b.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 0x72b1772be666dc9d04e699a108ae357783bc11646f9343bdd64d26c2fb33c844. 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/CNF201300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c4723a2aeb3c4168bd705d79aada817692a52230b38ea761dc2ad3ebfb1a6. 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/CNF201300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0adc9e841c2329dc292830d850664e5168ad5c24b5ef9b00efc16cf78843d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CNF201300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60a205cb5a3af7c1ea5e7eb801909d01c64164a08a912d013df78eb75ffbf41. 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/CNF201300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf529c0821d86f05f492c2db7f5bbde0e5653b3fd9de6975cf39d2fea6fc2ae11. 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/CNF201300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710aa2668418947bacb5717d9fa010f202d75cb8e5bd941db47b4f7ed82d9bb. 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/CNF201300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ffe14656167041fa4856663098f52d7279934eb0c274d9064440d584a62831. 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/CNF201300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5699545dae0a839e2ad8ff93f655939ced13abaaf5ddfaf1a03c24fd5b8806. 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/CNF201300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf195046d8882f46e2726d3f70ac5361288bf88cf274cc0668f59b97f89c4fb7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CNF201300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6a9e2b633253fd635f1815fa5df95259241e1d19bc498b4343640de18c3c59. 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/CNF201300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4264b9057bf70db5168dd1e3e578d666809369e2710cd84b712471bc6dc0368. 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/CNF201300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5012e2c7b6e685070053538a2c4ecf9f6b7fef413f88c319325923767062f4bf. 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/CNF201400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387bdefe07ac8cd4a3d39ef4ba06ff4c37bc8af3df934b1991b07629c8ae9637. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CNF201400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7edd6388f0e4380668d38800be7a89433beafe8916cd57b7e9278d9017060b. 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/CNF201400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6dcf7a65502ba609071ea06e61c6e84bf721cb7584a5d8578ea115e0188ce. 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/CNF201400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84fad76b65920dc5672ef2d1136b921f019cf2c38bfecf45366634c43c33697. 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/CNF201400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90983d4c8822029f5a3066e17015dcf2b14e1a48f6acc9d8c1fd1b7767f3f505. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CNF201400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc35f0cdd36057719fa0bc23004f9e5052603acc8c1a63fb7e38ab0a466237f7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR2X41933374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36588b68f3e0c3c2e42cf744e121944c6a411769d68c6b864dc87d415742a27b. 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/CNF201400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b4e0cc0238104a9dae74789ecb282071cfd427def54c30ab981175f630c229. 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/CNF201300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b45d2a22183767fba78850742cc53c48f25d889a86e3d57559e9cb2275f297. 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/CNF201300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a02df441ceba8c44922a6d2f292e5818a468319bfd6ebbfd5d1fea687f833. 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/CNF201300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f7845db9a9e2cd50f8bdc9bd97f9625bac6e1c65d196b61f470907c4c6ede6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CNF201300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615ff917bf5b853e26e41bbfd86e19083d6925f7d19e7af6603fba801366992. 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/CNF201300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76414f391d2479fe86071dd682c61962916cc020a226946f4bd3b2afb3479b. 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/CNF201300462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e1612b8b96a179cc94f855e8626b8b6da48822ba1727900d7898a59e522f24. 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/CNF201300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca10a19d641485ad4c4141d597414fa131d6e557ca9296b44f38bb1378f9f36. 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/CNF201300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da6b94cd5ba2175793d600c0ed4e9932eb796c73db4f56e6cf953ed8f40c5e. 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/CNF201300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9381443793cbc03d893bd1e9d7d8869007e7b0cb54c9160389a2ab2a72638980. 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/CNF201300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1abd39419ebf19ee32b4b5abb5e9ffd3dbb4ee7e553911321748179b630b7. 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/CNF201300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df9706fe1e67e070c50c52def44653d71118daebd2404dcee107cfba2a9879b. 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/FRX872025433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0bfcb6ba0c5cb6c4a98047083d69e12a0af55cb257a8fec34eba73cb78a621. 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/QZAKB2333203.