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 0xa4ac4761fbaa1652c0c0bb0f387514bcce1202335d25e30ff4210d7cf8d82e87. 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/4f85f671-b21c-4730-a7f5-e9e91c41338b.json and https://artists.proofprofile.net/proofs/artist/4f85f671-b21c-4730-a7f5-e9e91c41338b.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 0x18c837a3030a55b91a79f347b646eeceb0b6ddff2aa721e09479cc610a310efa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282213148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2318b7f6e076fd07d0720f04ccdebd723e7179e6fbd1299d91b0567d72fa5a77. 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/HKG732257733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ec8c99b64556beb7f11596871e882dee1085ab49704135e362943df5de317b. 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/HKG732257730.
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 0x73c596ad23481336f4373d2e32727d4e2ee1adf44576e87250db4ad6fe8efb28. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKG732257732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b7a7e7879da4287e436e441b973ef89032c90e582a781ba1f56eeb95bec1f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKG732257741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641725c63ccb245a11ed4ba40ea1a62156c3b4a68409c637d876f0e7cdfa89a1. 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/CNZ781900632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0b3a1a359884cacbeec496d8870216db13625233d79ca3c795d9c0cb03ade3. 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/CNZ781900473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b05e26fa2935a5dab95f9fdf226396d5d2facbd6b15b5865a6c61f038de6f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CNZ781900479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26fa287413cfe30aa86ba106b4546e6cd84933855d9fc1cc3f3a5445a531ea6. 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/FRX282202809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50ada9bb2fd1fc60fd5128c08909b502a5c59cb857e6f9db5450ce3a9e9890. 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/CNZ781900583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aefd9b6f240cd3e5a56ec096b7f3f4c0ed5e4f8d07b9979821bb8eb04760df. 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/CNZ781900536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ffb5c8aab2bdaeb0e5bcb9fbe48b713199e5ade15dcba57a3efa146e455346. 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/CNZ781900465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801dda7fc15828874e400492d039b30753e99dbb41a86ea2122ef0ad6d7c735. 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/CNZ781900463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f57b7591796b2b218633461be54a8bf046e8a727050b93ccdd43d83cf23b353. 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/CNZ781900461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946b0281148157b8edf85bca2f5fc991f2536bc72c98f7405f3781798aedbc5a. 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/CNZ781900457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b80387516fe2778180384a8c57cf03b6a3292275b0101fec7c21abb058a77c. 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/CNZ781900453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e806ec72d90b6bf61faabc5e0e4e624442c450a408dc439e6a410672d6c0d62. 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/CNZ781900452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054fc2d31d5eec0c70e2c2603ffb33876dba49a6844f1cb318f618c02bb55379. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CNZ781900449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee4e9f597478acc92c42d31ce629975f9437d4d1ee5be9f14a208d15614e0f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CNZ781900532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2483e631854f2d19f3df9dfef528e00d2043f865ccf68b94b01880c377511. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CNZ781900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b0792367fd81052169660a233714a6bf1271711a76838cb3e1fe63606ddf36. 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/CNZ781900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e05a2d8637dc69aba8dcc7cbeaef74e649991b5962dddd429aefce63cc34d1. 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/CNZ781900497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c1151816c9bd89133b8695a0285cf2935edea0d870067c8534f1e3056396e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CNZ781900504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b26343cf6263192c4ac9504517be7a6956e74b6b0128bb845d24d8d01b2a6eb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNZ781900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e90a9b4de7f60dd4f316bbdb5aecbcfb0c352c2e4b609422ca773205205c73c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CNZ781900468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd99035727dc7323ca28e7469c2d8854d76fe9cb9946261c56408f01efe378. 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/CNZ781900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23f7cb5bb9761845d27e9be918c840a1c27ae40172da189dcbe9770283fb5e. 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/CNZ781900607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebf80830f02f42ae242da84bc2ea9343e0c77bdfb3ec8f76021bdb15ab12c98. 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/CNZ781900602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c09e2301ccbb10e804a82b0efd54fbebd7695daa3cfcacd9c7335ead4e9f392. 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/CNZ781900606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8dfe5eb41284343b440994af164a34647dfc5ff789345f7bc88b6ae6f17fad. 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/CNZ781900605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376e9051a1ecf8abd4dc59d7c9a9c675625f1e71da193eca0df10a117d9fd168. 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/CNZ781900537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb851bd0170cd4078becab1242d09294b8465708745450a001cef95d3cd8be661. 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/CNZ781900436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9268aae0b3c93a8a822190abce45e615f29e10571271a625100eae0fc3fa2a. 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/CNZ781900433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74efd21367a4abf61410929e49a352589748e38c6ad623edec1f27b292b1f773. 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/CNZ781900538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c7ac80796fb98f94d45624cdfb749ea1ebee323d45a9b1ce35d6212934bf00. 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/CNZ781900434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cea59bc75416aa3cffebe1cf84fcc77d6f37d5aadbc82a6091beb100e778bfa. 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/DGA052077507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0708b313aedf20a74a72860237967d1a5a760f84569951135ca4751d510be2. 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/FRX202292051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3cce3fc7983440f8b85529ea1164c81a86e417a12a8c462d36616f9d29472b. 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/DGA0P2301806.