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 0x50ad7ea6b25f41fe1e78af9d707e79a18e65a048af257ed3d74839ea0355fe25. 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/fb2addd0-5404-41f4-8ed2-fc8f48bea322.json and https://artists.proofprofile.net/proofs/artist/fb2addd0-5404-41f4-8ed2-fc8f48bea322.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 0x860fd43814167bdc625196f50bc74abe198795aaf43506656e1d745a10775c98. 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/QZNJV2410794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059a13eda6c715d3b561e3ad99d9c549ae930684538a30e46303b5eeba4a5192. 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/QZNJV2410795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236335b0f4c4ac6749c3cf539c7c7a003b2b6685779fe69af7c7696e01bce613. 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/QZNJV2410796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a6f04564d216d6471037c0fcd166c4f9b26b7fdf5e7e816f1fab0cac4608a. 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/QZNJV2410797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655fa9f0b28302ecd2b4469277596d14e2698400af7f51b601444f757a5d345. 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/QZNJV2410803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4920069e7f51bee5cc8f1976bf8f6a44d2cfc16d2c390d2ad51af8ea5a467e. 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/QZNJV2410798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf80c78f70a647f58095c5f55e471e49fe960a49945ca9028940315126de1bc. 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/QZNJV2410799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57c189a0db45e96f61548267c786045c90f0ff6858c8d844a73cb8b9e187b70. 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/QZNJV2410800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ccb01f0c4cd7f1343f9ef6a1c59eceb68906b63795f400204470d2991448a. 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/QZNJV2410801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2985a876bf94b871e7288e603316948894d47663fe5d034c2b86dc13307091. 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/QZNJV2410802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb745f96cfab6b2b4697205904739aabc37ada0138c3db669be33761c2e6734. 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/QZTVM2307361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fdc675b44498bb34cd70a95f70d8d60d68cbb084bd11690abb32eaf5a907ad. 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/QZTVM2307362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fafec6c6eca165c58d033b2fb68939d1dd72df4901ac92407adaef07d9de5f. 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/QZTVM2307363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d2ec3cbc7b2cf91e9f05a75fa3b9282c093f9a419fd0f88cb951b1c43054c. 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/QZTVM2307364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52309a4109574719e221cc454a652bab635852653d543883b2db343fd849e4b. 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/QZTVM2307365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abaab895bcb678e7beddd026bb8d5b6997587c19c5d393be74ee045f5b29acb. 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/QZTVM2307366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908960e6755aa6330319d302bb693354c18e22a983169bba6072f0350280efc. 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/QZTVM2307367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342df353c9bef278da7147b7179aed117d0f18a86154f2e67dc66505d2fc4e1. 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/QZTVM2307368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31efb2e298ce978dc67c49b1f64685728bf136d7134cbc07e442e3915189019f. 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/QZTVM2307369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6527cf4507f730df646e698ca9e8a9eebfdee09da9dcb5f01fa7b90dd55d0cf1. 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/QZTVM2307370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e2aee8c2c6baf88e90ae85132cf6d9d8ff97a94e5d6a6d33f83722d664fbe. 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/QZTVM2307371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca5e5875e9205cef3bbbb68d561258d5e40f35cfc951e89a12d6b072419483a. 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/QZTVM2307372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ec34ddcfa3fb208ba8afbf06b92ee31953a24ec1e4ffbb0a684ec20b22c18. 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/QZW9L2280969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c13d5530b11f12baabc4d111e4916bbafaac6fcd3951a6e10872611e0485ab. 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/QZW9L2280975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf3808d6c98c511c32d242cbe4a317183b091251d05ab8aaa5e564670527af. 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/QZW9L2280974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341277ca3db5f10e9f3a77b2c0f71a5acf863c907b00b52bd700760f8762322c. 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/QZNJZ2314927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3360a2d9dc23e394eea6d7c43e32a49fb17907dd037383b281c9341a3091df93. 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/GX38U2399948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6f0450ea5c518107728b227f5b9f8547ef5d42a6e1e8ad331c5fe9f9834f38. 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/QZGLM2357314.