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 0xaf41aea554515d3a97fed1795446f9e35ec4355ae070e43446dc4e431b257c8f. 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/9c764911-a784-48f4-9ab2-720ce315242f.json and https://artists.proofprofile.net/proofs/artist/9c764911-a784-48f4-9ab2-720ce315242f.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 0x138c24c59bbe4eb0203dd4c25220e95b27e6c3705fd465f50f3260d0bd402805. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:43Z), 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/QZDA42132864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97683e4c1ca397ba17e368d10c7827960301af587b931b23141d54fc17b9b4f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:29:09Z), 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/QZDA42171987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6411a119afb87fb42ce12de9efad27f1fe1d2d8b40d608cc1acb904695cb07ad. 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/QZDA42169969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe8408081b11c0456cf37c985a623432e511190607070500c053faac3c3d00. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:37Z), 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/QZDA42110381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68572db81857627e893249c7f120bbaa6744bdfb619192fe9a85a84346e3c660. 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/QZDA42161626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81bf9a5d33966f906df2bf774a3da9bf4d3f5ef42413e8295b428e6b479dda6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA42172008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb61e586dbf2e29fbf95ec820d532b3a001acea6ebee2154b33a8fd8e3c3cc. 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/QZDA42183674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf187d9e843847d143c90e3389427bb48995cb10beb88f69ac12b6c00a4fd5d. 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/QZDA42183667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664131eaf0cd9a2249c95ba048bfaf83f4038eed2bde1e70d34f908dc791af68. 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/QZDA42142207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f7dd20549ac07a4b97b18581d676ef5abb8d3724025b7d19870d25e289e8c. 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/QZDA42185679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c890b63b35f9c2926887d7bb40323a716bcf27db2e155031d34011d08d3b3d. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZDA52145028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2307c1d2fedb1b9f59676ee6a622233d7eb3310ece105f0629af43cbe41b1c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA52145029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e38bec76947d30a5825da7d5571bc32ba31bb401aa0054114fadac3c81b82c1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA52145030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643be239b5d6d52a1f4de0abc840e8adc2bcc8611958d85b9b313d783edfd16. 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/QZDA52145031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d6bb19ff19996b05b6c7b30d039ad4c37d00c36c4cf7e0b6078534e3f2245. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:33:12Z), 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/QZDA52145032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b5a752e5f1476cc13655273d87e65a0eaddcea315513e5e7a57730a16d4a22. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:07Z), 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/QZDA62133746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae9415550b0135d8a3663f0d19578f81865315734b232aecf4dd064e6cca77. 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/QZDA62133747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33be00da79da8de1b1feb9d5a185e7e8037ab9df70600d9cfc5147a8a952413. 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/QZDA62133748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde0d927f290790cd94180ce9cf24db0c9f8e572d0a068f093aea049c41288c. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZDA62133750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f303fed5468e1c3cb895c39df3b8b0f5637a2f5d04a7325caffa83940fc2fa. 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/QZDA62133751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600aed9d0595a8c85ec35524f5d8570cee4e92a62d7180ba52f0490638c17df. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZDA62133752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae827ff74fe5490a4af5c4096954a8abccbcac035a725b1bdff96dff49f3689. 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/QZFZ72288592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1463448d3c5df177ce076254bf5428480eb98aaa38e2ce96d64eba13b77585f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:23Z), 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/QZK6N2319081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9468273d8cae3d58bed7291d5784cc35c6d8115844531a81885ca1a4c884c4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6N2383635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700803fc7ae45ca291250682f4f8d0d31b1b504a47b2184fe032fdc7b9777eca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:07Z), 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/QZNWQ2384717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79646e614b9114029701b90505ef590edd4f51666508a1706211289a94dcbf33. 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/QZTAX2316163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4069b98ee830f2530d6531df0e6d2504bf6f19ed4690b800cb7a31e2c4c090. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:08Z), 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/QZTBF2393693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3eb6fd61991e34c3608eaa6ebc9103637e43b283692e9ff43d8530af2248cd. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZTBF2393694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ed56c8be75e169d93e4a8b2cbbe486b20093dcdf09f0013e2dec64cc12d3f6. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZTBF2393695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697fea089ca420a98a91076b95b6d2212f1dfa30d4d5d13fbd02bf3aae26fd44. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTBF2393696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017953082d75f35b1be0090573a387da1daf37edff7cf9e0aee62de49e873abb. 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/QZTBF2393697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89792653b2b4775c5cd49fee6988249918c3271ad3c208b36b4b35f30f7f2c6a. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZTBF2393698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991737204affd6542a21a7379ed221c8dcf0d1636d4298a6241c41b0224ee5f8. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:33Z), 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/QZTBF2393699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e25373543cb60832c683b0c762e53c0a0817935beb4b00b2adb7cb2fdddbbd. 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/QZTBF2393700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a428f440d6c7163f9d28e74a99544350af22bbf8196d94e27d9688ec420210d. 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/QZTBF2393701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3a87b14c173e589513c09d16cf03530c0ed4130a79214966bb3f45441402e. 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/QZTBF2393702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f5d83b620eb1472101280357ee2988887691a9b46817f1eeb1809a17529e0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBF2393703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841a9e925736a29de71054dcbd1164f54e8e2ff143b857cf36d5004a7f93e067. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:23:48Z), 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/QZTBF2393704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495a10e55f58b68e7fcdb6fc5dd5e627c28f2f9b68a3135786dc24419ef7e747. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTBF2393705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2da0c2c0f6b60c051c0f7b12aa57cd431acdb8e297ad0675bcb0727b91a5aab. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHNA2427953.