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 0xd5555f96b3bc6ce501c7f38b2a78a84374aedd7fa8f6d5d0f8f419d0f9f7da84. 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/c5164096-c7d1-41cc-a42e-5fefeb9d01c8.json and https://artists.proofprofile.net/proofs/artist/c5164096-c7d1-41cc-a42e-5fefeb9d01c8.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 0xf5e985c4998a20c8bdc5b060d293420bb037eb2b2f7bd6452216d335a80f6741. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL5UZ2409972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbec92d3fd6cbf6a0806901b86e287aad705a35380f193384edbdbb408ca9f7. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NL5UZ2411100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e4dcdd4d32625f7870002be424553baac4a1c93b41d9ed1a35ec1966691407. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NL5UZ2411101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27e3eff92986eb944b670f62483e94e825222c893707eafadc63294932ea0c8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NL5UZ2411102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd27063b008b91d02eca7f815b26113de83f3a7cf132cc29bb25d8c7d3ce38. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NL5UZ2411103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac6c857e718f9590f25547f70c710bbdca566b7f811e78b54375a02fba54f76. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL5UZ2411105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d4138bea8ac365964e03f1c526607033a678927e1fffdae11c81e109f4b1f1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:18:07Z), 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/NL5UZ2411106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f60a3aea9d435cbb70984f76229dd70d40b6d6404ef80d48be39c8822c592. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL5UZ2411107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebc98ef99ab5ca09a702d114a4154192ed5ee7ab0605212fbc1fcfa32357611. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NL5UZ2411108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb69bc74e2e68efc5c7b135d49db4a84a75eada04588633ba4de2a7ab2622aaa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL5UZ2414480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8964dc50a9f8fe8e53bf84e30cda5537db7209e6ffb872761c4f82514658862. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NL5UZ2414481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f12994dca2c5d99718a232ded0f35ceb93ee21f4eaeeffb068454cef0060c60. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NL5UZ2414482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b11e3a9050ec3cfc37f7911be1df340d5aee47364b41454b32edd469930ba5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL5UZ2415176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9409c51456661b41ad1abc9d63d44ee26a4d2206d735c4bec393928dc19baeb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NL5UZ2415177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7c97bd1e33fec6dc7fcbaf3da29c3a2878c189f26b60a34d1737eba7296a9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NL5UZ2415178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e65d8a47b112ad3b4123580959fccef5dff7b549b22a6126794543a5627e31. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NL5UZ2415179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e243f1bbf0cb7af0a0cca6766c5c627c6efa3a06d7bf3c2f6d780b148fbcc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL5UZ2415180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac5292f147ea1b19b5799da13a0477ca9a61c94ac732b724b7aef751de7fa67. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NL5UZ2415181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855201429ad3a766aa1d53cf87db5f13c600037e5c588796bf9042c3c52e00c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL5UZ2415183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b9a05d7ee1950f8386fe358a44180f55a06c395601ff9b93fd53575f2b9c9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NL5UZ2415185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb992b06d734fcb280d5b99740df0e0cba8b323c299027b63e183bc49f38f267. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:24Z), 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/NL5UZ2501086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888dc2b12dfba362450d4bbc2c775993d9768cf7d2910c7aa41b219955e2e5e3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:28:47Z), 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/NL5UZ2501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404f5b558e1e0e07a2078e4a6ae304355fa3268d897ae6a2618894722b90016. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NL5UZ2501092.