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 0xe55f27674bea39cc101bd538a7e39f0b49905ad87d57301131062b7374dd9e92. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e14a2a7-343d-4010-aea3-509b2e25102f.json and https://artists.proofprofile.net/proofs/artist/6e14a2a7-343d-4010-aea3-509b2e25102f.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 0xcc992045acc4f56b25e888984075143bd682f911ede4e0ffa4eef9bccf315102. 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/USDY41624084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e9d68df07fc24960a1211ca1e1b9552f0cd1acd31fb8361525aecb9098855d. 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/USDY41624085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86febfa6ce0b56eafa24815f970d9c0a41bc8192094607d1fdd6b0731b4ecb56. 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/USDY41624086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d4cfd0a20fb94cbe0fe1c09de2b0ada10f4e42405f4aeca008031d254b515. 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/USDY41624088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a3f8590b865f18b549070c04dd511f5a09ed8a65875f4b62d1c513e83723d. 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/USDY41624092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bf758679150ba5666ff109f771730b1c4138d4198f927167cb33cb495c2854. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY41624083.
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 0x413ee6a10519cbe1146e3cfa80676b7e9447c07a8c304829e4d913d0eb8b318b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDY41624087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25532c5cb64e2cae6d4383bbdb7ff570ddcaa2b73978d00b201cf768330911f2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDY41624089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46907e3580ff309bffe3c2f7f0afc202b93b442f46c78006ffa8d462780cdae9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDY41624091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438a2c0f035320c47acd87e5f8466ce4da587d880b95094e0e87f007438fb1a9. 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/USDY41653160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acc5a747188b767975e06e04ac3694a9e98f329a1a78847e938bd2d9bd82d7. 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/USDY41653163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a14f6859e463a10c373c047e2c23b0475d526e39ff26ef41ce8dd4ddbb3cc9. 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/USDY41653164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5600257444cfa4db1079354047738cb1e86109e25786c9e51a4ef4b2e7a7bb8. 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/USDY41653165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5d4abf85b976aaf96217931791072e12abf73fe1d10c5019aa828a0406da48. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDY41653154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fac3b7a6b8ff04a5d05a25b7fcc05814b436f964859ea542cd3de14bb6b42a6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDY41653155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b107e0a1884b5cc9358f4ca98cde72e4fca5d973606ec8b8e61bec303bf9d77. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY41653156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362f519b6e128d875512560518d008d7b4f12c35486a1525e14046a6501d457. 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/USDY41653157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e484d5b9e7648d0ccdc6fa24fa36345b8011ff7f5e9291fcd5b076d1d016e8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USDY41653158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920bcab7090bd8fe40f68ed0d48cd7ec3d7836e92d6b02fa172ef40290ffcd80. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY41653159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55efa77636b2602b4fe2f252fb578f4d8a1615cffb3399b17221deb72e82318d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USDY41653161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa854fa6e4baeb53e9aa521c516cff8637e8e71d703cd6e35457bc2790359f4f8. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDY41653162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6a3c2495eff87e8027c5087b31c93b8bbbf48be35160a33284e5ab4f2a7f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UST8K1862350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa1c8697045ed068cd17a2f35613f64af2c6412de560a0a270c79f2a6cf299. 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/UST8K1862351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf415e110c5df02ffb13c2eb0532658a71399c0f5b88ae909dc93d93654c0bd. 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/UST8K1862352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7465c15a85ab8b493b891a8ee3d66882d4b62d683345fafbf755e184c2aeeb2a. 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/UST8K1862353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2efc8b317c7f890b2e91ae1f6bcc6a58a3ebae550390a2e6909f671d87a83. 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/UST8K1862356.