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 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 0x5e77bb50b60462cc4afe7d26266bb95c6253756a2ead9a5c0b5e19d68d6178c3. 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/c3bae869-da9b-4665-92f5-55cc998ed3d4.json and https://artists.proofprofile.net/proofs/artist/c3bae869-da9b-4665-92f5-55cc998ed3d4.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 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 0x8db057cbe022cffb4565d955059a79b96a9c048ceb333ead822790ffb46611e2. 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/BRLVK0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb81e657ddd5a5387fa06e74c7c0dcf87146ce5acae6bc111dd1a8531260ef2. 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/BRLVK0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815965e3efd7797ad7da525c1e7856ac2ecfd2633084798016ff318d3ec56e60. 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/BRLVK0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e8f350d46ab4f1fc9b7033b927917840f702e6bacecbce8ecf9ce0780b9362. 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/BRLVK0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61365d11554e45bebfffd70ed711223c13874457808bc505a62c572950a44bdc. 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/BRLVK0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8096950d65a4f915523de7d6fa79ef6f7a190e4a1ded7c881a9fe6b34d28eaa6. 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/SE6N62100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b835fed1d7b89b7b031ec64b4267f311700342cd8bd80b0a4632b87dca3544. 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/SE5IB2271841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602649f8bfe46a9a65dfe8be05ddd5cedc210ffccb78cb4bca9b443cb71061a3. 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/SE5IB2297620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f62fa01614b7a37789d7f4a9390290a2d34a9560abcafef85c7437e156af20. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6N62202069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9400067f615084fbfc9ca80a87f0f1b18cb439e7379c4e826666d2c25cc7076. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/SE6N62202509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f62fa01614b7a37789d7f4a9390290a2d34a9560abcafef85c7437e156af20. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6N62202069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9400067f615084fbfc9ca80a87f0f1b18cb439e7379c4e826666d2c25cc7076. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE6N62202509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6fbfd25910e8349687c2f6c28aa12e55fb86b14e2fce343850db7e94605e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6N62203347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7924cb6fa5e46621cedff2a58f1eca348734b52fa43a6737ea20dfb9cc835a8. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/SE6N62205136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca6950a29a3095b58e524f306a809f944367d40608d785c14a042cd627c9d2d. 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/SE5Q52401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066249812ac57e7ab0027b0f1b361578faa4cbeeb50f03317c4c8202cccfad76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q52401062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2698ad4ae0633a1cdf98e51bb72f233c2115fc470840a71cfcec1076c24cb167. 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/SE5Q52401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c3a0c0d31609da1ed637c276dd35e98734f3f2aab0f798fbe3728ddbe2198d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52401365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd2e73de6960d4258ee8b2ab8cd2d9d794ebc0da1052d6b3c02b99de38aac3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SE5Q52401065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8eb799dbe041594b39a2de4b68b1900d39cab03ac7cd24084bbf09f54eed3c. 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/SE5Q52401064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a0059f06f70a4b6ac071bfad2727295137e25eca7020d7627c0f3b417ac1c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE6N62210113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58abc40746afae9ee82f0aa83d90d071f01a8cba06e63182b9dd997457b699. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6N62213760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6814872edfe94db64f9aea8e39eb3b0e2f2438bb4a93dc02b061d4f8bec9daa. 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/SE6N62203555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58abc40746afae9ee82f0aa83d90d071f01a8cba06e63182b9dd997457b699. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6N62213760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1e961d0f48537243e00e56d968dcee4775e46b2ed1755de0c00524e4391da9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52502016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b1c773cce0995b858ef0c1d70ebb415bd4040236b0c22e762e38bd3542be7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6N62500800.