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 0x362dff7f95ff7adca228d17372cbeb8da60848a55bd9e3e42cfcd6727840e9c5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd8817dc-28fe-41ec-9afe-98a5af2eabab.json and https://artists.proofprofile.net/proofs/artist/cd8817dc-28fe-41ec-9afe-98a5af2eabab.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 0x73d41b8c0e8988384355887dcce9da551f145d0cd5b8a3d7ac389a72c9ecee4b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TR4870700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5a8584c29d77bcb32d0ff8ded07e0dc3fd9e47a6d03a71cfcbc6c6e7ea9210. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:54Z), 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/TR4870700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162d2d1c362815c55f371c89e632403fdc54865bcdea316137af8078ef070333. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TR4870700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a605e86a58b415a5fe34d3d1e540cdfa6e0903e25aff74c46115cd90b6007c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR4870700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8dd326203d7b4c76d62f43a6fef72489b149724493e5d2af50340dd4d4066. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:59Z), 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/TR4870700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce37703d85ac4a3af0be5133a7f87e1ae682592b95afabd053f76fe3d53c0b28. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TR4870700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d312faaa7786908c6438a9a64bf28be84e47d95a05a410879fd937149b591. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TR4870700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9c6a1062a963a11822ff0019a5e473f0a0f41631a043ca8514cd098cc8b0b. 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/TR4870700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0897ca2cd339a525488c0a85b891977e3e25306855d82cd158e5b8fc028bd79. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TR4870700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155dbc21efdf3f799a397044071282111c023a27b6922687b98d04cd7728646. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR4870700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3feae8bbfe065b9333914b718fcb396a1c6afc1e009f1cba75b062f8ebc582. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TR4870700317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874a1aeed1fc6fe136807bd952eb44caeafbf609c2b3ca225d1ae60c1c5c7225. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TR0410801703.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4122e2c7a49a94cbf5c5cead6d85d2abc57017f996ae7dcfec55a058181eabd. 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/TR4870700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f21f9674ce09772201a85ae79d1fa2ab5fbf3cff9ab4c913a728bd78ba685d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:13:41Z), 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/TR4870700358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956306f145b52ad5b8d67436c9423827711833cba5594d5e6251ee94a7d15033. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TR4870700359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb571a61bcb595c53fbee39e60253fdbf3c15376c98dfd79427b0259567ce1de. 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/TR4870700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557881b9de0076cbd0f85575c4a07683e2b74e34fbaf9b7eae1c3c6c4303be61. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:00Z), 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/TR4870700362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f543f04855303003832f2ff99b62081c7338112fe5387f7db626a4bde7852. 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/TR4870700365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f59b5ce82b6c807f2777c4e538a9c6b9fcbeee5340e40f3a3cddd09f9a8b66d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:27Z), 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/TR4870700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79316622f899b292624daca9651b847b61363997dbddfdd454e7163deb5b4acc. 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/TR6031500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce9a307298cf40be5bc4a5a1b67618e8cf92d0686288255438ab22935381e4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TR6031500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc13121e1961f151a300e61275436e30334666a1f5e1cb1e54be23378792b3a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0410801720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a561f06d8ad398103f858f0c58103a786e9208b40d29d079044859c50afc6a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0410801722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a9624c7434b07fa3a874a4f807806fc46d0ab24cc929a34959cb9fccdf9f4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:51:49Z), 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/TR6030700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffaf56309691fd05a7effa16adf2d21eaa3fb86fcb2cd20de16d1c3446ab77b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:46:56Z), 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/TR6030700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f460689b5756b6aac3401191553712b2101703126c06a8263e1bb23e74e886. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TR6030700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057074481c7646c2442287592159c49d4effc18fa08b1413c3b473486ab47f11. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TR6030700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0f40ed7363aaa6033b35184529f47a5a48bf19f0e65253fdab7ffbb6d3c73. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:20:00Z), 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/TR6030700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e98b93730a91363138d9b3c4b725217d604fe78b2084e5bbb19e02ebaebd45. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TR0411002557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53e852dba231e434328370d1cbf747ceef8d54a57790b905df290610f8f98d8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:04:28Z), 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/TR0411102639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e83c49b0f399e48788bb59c6b3aca9188e3ea2e33a6c17db64e429e5871dd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TR6031400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf299e2b7e966bd7d12e88891da5fd88203578469a4567603d9472adc5d2932f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR6031500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89fabf5f2050abd6b8fe37f0436b95622aad6f773a475be6b106868b58a661d. 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/TR6031600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac89b0ab638b4808a39fc60e02e7f2ff8fd3cc16ca0ae55b0aa5fe0a7e79670. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TRBEZ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56026790a2b2da85786243b0b4752a8dc83e66dbaa68bbf7d57a139c8eafd36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR6031800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d59ef799820f58c46e76e40c4d725f7f07f635aede7a9e8b2cd2bde61a7a23f. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:28:21Z), 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/TR6032000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd4a691fcfa901a11d577ae2e787ff2bcc2c657fe5395d9b410d1c11c4a1ac. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TR6032100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6bfbe79835f00efa217a38ec290b09a36a1bbf8c2dc78e28199dd1f914a91. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR6032200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478424b9fd819528505d80b0eb9b7f6c65f15f912951d62482750f2dc717ea6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR6032200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535d3eee390b63fef1695d6cd9df9203b086fdbb47b6516046a48f7952d4117d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR6032200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af05dea8a7b361d87b8a4288c5247c12bca3e2ec1c8a5266c68c3c899fa3a22. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TR6032400002.