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 0x13e8d55b619d171e20436af640f047509db5d8380c4cd99dc498108317daea51. 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/4a01871f-3563-4105-995f-47ea5b998b0f.json and https://artists.proofprofile.net/proofs/artist/4a01871f-3563-4105-995f-47ea5b998b0f.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 0xb51dc3898c716639472449582737f401e208d8e4879dfaea3826c301f8bd80a3. 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/QM3DF2188639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138877c6c424137865cfddef0e28600df566ff4a2055f58f69fbf16c0fca2ef. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QM3DF2196901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0594fa9e2d0a3cae71a88ae977de47f9573f6b8e0d38a2577134f9114e184a23. 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/US3DF2297852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3fe3bf55281abf4dbb7f4299599f752865fea3d6af45f9f4b07e0cd020fb37. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USANG2234449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa127e595bb27c846b291c9158c95b25f658d52c2d6bd6f1e6a0dbb0083b1f. 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/USANG2243205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d0d6907a6bd18718d7c2cdc31ba8186bb487af6937d688b43514da58a4d26. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMANG2213173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b141b8e2847a82640479ae278e5ac5420303a5151e64d1287665c14f9a2b2d. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZHN41975148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d273939a67ac20a8c6e17a6586189f739daaaace18b9b3dd5f56f0281e9f7b. 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/US3DF2492741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a79af16ce292d390398648705b99dcf8a81f06da01dc2fa9f2dd4ddf9717245. 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/QZS642488718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d17bda4d0127c8bd611773e923f13e35588a24f00b865251e02de3459d6e6a. 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/FR9Z62400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c720a411b1e3e2b5ff753f3282afccfa9a411ce8daf31c64348e11694a50a37. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:49Z), 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/FR9Z62401000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81c6fa9f1a34da814e12c0f16e1097c775a9af4c0ad57ab68ecf25c338fbea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM3DF2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec57d5075c93e64282ca44912e790a0f5fa26c557dc802655bc9f670a36762. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM3DF2401575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb73e48a748e606cf82793119541c9f5c9c727b65969bc5881387d38c8a6d073. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/US3DF2501859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6392c37076164a9927c27717e3d5989c2958dd3fb0bc2b34fb49cac5c532ae03. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:05:28Z), 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/US3DF2501840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb454fdacaaae88c1010b3b8c9431b738b87988fcb6f208e2c9ff8676843ede. 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/QM3DF2401577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c342af2c1b0944a19e1be2ff5af23fa259890d0ad2b34cc48e1f698383f29. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM3DF2401578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1020c903f761e20789e99ef8ac945cd0fa22afb9e622520a13b31d56077db300. 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/FR59R2522423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2622c693bfe141f39a27c3c9164f440a5a826678f4f05a3f1535920677a20d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:09Z), 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/FR59R2522424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3030fd9a416047d046f67878d5fa1270dcc83279cabdc70df5499186d6b6080. 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/US3DF2552524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e364292e12f4063cd44ffcb44339dd3d579e94dcac824121324934bb7ba4db8. 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/US3DF2552527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62507d9bfc226b8021411e55eabd91bf7d94557e5df5b93beb1d3609d5dcce. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/US3DF2552526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b980e947f368a0a2eb1ecc5b761c14b521577dc25e0bc6b8e3b62ca2cee61. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FRX282598215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241c412eb936a7aee62e7cf0b5bfa167183750fb2dc774050341e7caf892ad7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2575022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe86704ea1a2a2e92d0400f901e5a97528745a0e25b3c45e0ce3a03ec7d26c. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/US3DF2584910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3dd9841fc4be0fdf8025e2db67c18dbbd80fed7840a0e741b14a591f2b25f. 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/QZTBE2587144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3735d53edbb8211a911fe30f028c34b71407155ffb076988137496f9204c740. 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/QZTBE2587147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0124243220247564cc4615b9d876a1851a2259e60d7157ce451f47632fd690. 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/QZTBE2587149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33109f994c42916f8582cda68d93c991650b6b518301337ec8224e9531084b70. 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/QZTBE2587151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a7561b7d44cb9c1311b457607f67a9d14fddc186624a3949c449a1f12ec652. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBE2587167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891df5ae969e94f3dd4fbad1e0ef82f40baee112818057fabcef8e93c09d68d5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USANG2501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dbcc224ab1b74d21579dfd72eece19f4f69169b25323a287ca9b12c35aea5c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USANG2501024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fa116e8edf823488b619a5de69174206f4855eab49865e2e384a6c8267b2d0. 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/USANG2529477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2760e63ba3b30ae3f20ffbaf08f5712c04c939ff54c1175dc0cadded3c20a4. 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/US3DF2472069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999303226a5d3f112e0af3f3d4cd222838980b0690e5e8c4874c0db985430ee. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USANG1923756.
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 0x855535142a7ecded6aae2c004eed12259099c3a755451966c8913cdb4d4368fc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US3DF2114421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d06feafc2eeb95ae537356f996dccca60edc26636267b844e746dd57a193eb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM3DF2270063.