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 0x626e24eeb2650ae27f2c7b0b67fe12be508e38e059a7d27282ccc4d09c61244b. 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/b897beb1-2dfc-4882-8ad2-79e9302fb69c.json and https://artists.proofprofile.net/proofs/artist/b897beb1-2dfc-4882-8ad2-79e9302fb69c.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 0x73a490d05f5bf187659f0fd76f5791bedb547ff4d139b815ac1fa82266c45589. 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/QZHPJ2075249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8147d6a9e495b790311b9cf3af8b28735149bfa3cea5516dee50353acb1b0a. 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/QZKDK2039609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82112fa774c5d76c2c1bc4817092bc8b74c4489dbd7bd55c63805689a5f8ef53. 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/QZKDK2083580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bcfdc382558301f54043352c04cb8ce93462ea6df624f1f2b06ba18d45dc29. 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/QZKDK2027102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c31f9c2c0d4bcbf088117aabbbd46c3907a91f92bc216f999f973557a9352d5. 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/QZKDK2010910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96987b3850b7b6bd1711366dd146f1fd0f132acc43ac7ed7506cd5752f1b9154. 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/QZKDK2026657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d065f42a9a4a41ae13e4d4472d738da0454bfdf0fcb767aa2a0da588a96f77. 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/QZKDK2022928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aec942cc476eda3de1d7dd90e52df0e1b345df1a59bc926c181beba6bec97e1. 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/QZS7J2395217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8da8576ae6b7f620400ae73fb4175ce19224b50c1a1aec41d01d40b56102af. 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/QZS7J2389937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f76f828bf57c6457990428bea672ce53dd38be9d868c9ef2676710c0a57531. 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/QZS7J2394962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a212cb9077c6494b5d31f41bffca5eac8d749f94318d9d52bdabfc9f391dde. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZS7J2306941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9803d2b158682effa6410d302d058130d3b76bf3bdd4667cd08479a6864a13. 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/QZS7J2310960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a37b1eda1de21824e7e035db1842eeb7e179f81d44e855cbedaa6e7c35d8ed. 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/QZS7J2353138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548bb0f662a970c20a0cd02677ed5f02d8b5071dd96e6d6c20d358431ab00188. 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/QZS7J2386102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ae83f1f6ebdef4644bfc8847c8a5daa20ec43a6f8782b2ee6a1e4919308a9c. 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/QZMHK2222920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4e2a3f7a6dac9446da27e621a1418f513563995cfbb5e262abb75204c75ed. 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/QZNWZ2116603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6d8b0d9f0dec58ad2f3bc1d8a977c51bfe34ade2b7670e466c2ee23a655ed. 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/QZHZD2275682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb13d7ba91928973b1887c153288507a6950517089725119c8c156e8148df0d. 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/QZQAY2434021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead8bf968998481324f3f07129b7fc4c7121a674c2b50d550cd7898135e6499f. 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/QZTLA2435475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c5fa56c531df06254c33954c4585a53fb6f86e1395a01f63c0dd3fe0dc7eb1. 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/QZTH92347801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b40c83ba3e28547f3619c92c66707966989065ba33e824c1267c459f06a1860. 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/QZJRC2213888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69442f881571b0556001ab42de580470be9453c2d81e1e74001b57efae1f04. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZJRC2213891.
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 0xca7028ed6e5f735107ea21e2135fbb3ab28f5382f54b5eae104ed7272896c519. 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/QZJRC2213890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61222ec7c1666dec391ab7bb9c9656cf237b831cd172e68e9e4f684ea497f073. 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/QZJRB2278513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7aa9f957ff6e88af4276e52e3d1034ac2a248b6662472e5a4a717587ae351a. 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/QM42K2266369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f21388eb7d9b359c8b08cb18eaf9a0b6215ca67a4ac69ecb6c570e7a7e120a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:39:35Z), 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/QZS652178559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3003486f1820ad37a11df537ac6063e53ce4994c9dd1f9a61eae75652f055eb5. 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/QZS632162194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b51780d88d3f88c9c26ec687e60f3835afceca0e3430e50f876ecfb9150b0. 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/QZKDK2102683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6828acba76c06ce95ef3fd23c102e07ac394552e13b8f90e313d14a40feadb. 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/QZKDK2083848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de405909192b40656a6d4fe9869c5e40d8912cf05427959ea77f4526a19350b. 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/QM42K1985547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86346e390b944ed0c3fdc6a51d03336f3bb4f253ead51cc30e22a64af2fcc6fb. 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/QM42K1988602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe422e4d74f81ea77ea2b62bf1cfea9139c4b737d49d052541e2d823961948bb1. 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/QM42K1901503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27bed3f9dccd2d13d40daffefef6825299724a1654470cae342778266efa69. 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/QM42K2099663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82945b7f6a7be953e81ba74df4e7c98b16039b4f90f6f06dc14039054f6672ec. 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/QM42K1919862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c0241e59ea6c05f4acf9d22e015ed2ad1e73cd9930d4390da674fd53aac7ea. 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/QM42K1959775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad1d41bd962bae1796476c22c4ed434d91089776a84f4629a1183cc9cc7b6da. 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/QM42K2049888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8db34da16974ddaaccfd455bd97f30e243799a9bb7fbb52d711f4733de0655. 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/QZKDK2091461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2544cbf753cdb98d26829e11d2841b7ca0d4980ec86b88bd065fb13b6d9dd. 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/QZHN92543558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8e1e3f889ccb8b74bca00a32ac50e2b012df8b073fdb1af930bd9367798006. 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/QZNWU2387628.