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 0x95fdba03e42df7475d5137a22d592c7da700121d42d86ec2430e23ab2551dad1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fd9c3ea-f1f8-4e47-be04-558d1945f553.json and https://artists.proofprofile.net/proofs/artist/5fd9c3ea-f1f8-4e47-be04-558d1945f553.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 0x94219b43ba94078966a51dc710ce6224badf468b09ac7f0dc3a76912a7f847c0. 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/QZFZ22317863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e344a332a3e127ee15e659fff9618c985816ac9ec74f0d163daca007c8b39a8. 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/QZFZ22317869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865070e7418f361feb921182a402944dd2e5e83bce26734a47a096471c0a59b0. 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/QZFZ22317874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173a4b9939bdfe4e44c093946791bcfbc6c160a54dac912a9b389331e20fa90. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZFZ22317858.
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 0x8b487395465bdb6fd9ff87a95fc55c389f59be0dc9830b95ac30752f009a7c1f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ22317877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6776c6a05e5042be36dda0e191410be7e55265859fc8b28acb1bf48791baf428. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6Q2362831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bfd835e53a57946b8e3dc1597a96bd014ea715aff521149e1d7f85af094b99. 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/QZNWZ2358027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b29589c29fc46d4220993bf1bdb8533fbb69012d71474821f8a5b4b1099112. 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/QZNWZ2358028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5622a207882c8ee00409b69b64544d53a67cc7f49ec96cb4da856f66dfbd8. 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/QZNWZ2358025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2729f0f019c8b577f7e615232911516758816295e4a80c8413807748e375f304. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWZ2358026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbf1e501c2f5d53e5ab287cde0f53dd8471d3d3a3177ad62be715e6e1572244. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWZ2358029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee239e5ea807c00980517cee16bd8047ec2f38466cb3f99db59a8c315649f47. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWZ2358030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437bf759685e1dff15d02687c993fe54c73fa4675230d3b9533f8773f0a0eee4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZNWZ2358031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6185f313c56f6db1c9b4405c5006ff85a8f8dedf8a6571657484abba9efc3. 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/QZNWZ2358035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1534b9f6d0a1a0aed6d3c2a917d44d1c231001bde352634a35fea6a3dc0724. 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/QZK6M2440816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde154e81cd7cc02de0818bb21cc9771bd31afea950a48873ae6c36e99a2f451. 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/QZK6M2440817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9ea89b21c89a68464218b4945b501c04ebf13dd859949d04e500ff8e3a5dc6. 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/QZK6M2440818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7e90644f4b6fec4b4aef30e89931104cc5ee3518f259b1e5a4da1bff57a55f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6M2440820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9ea89b21c89a68464218b4945b501c04ebf13dd859949d04e500ff8e3a5dc6. 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/QZK6M2440818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13127f1ebb8ed4650f0047420204d30a5bc0249de3fdfd41274082e8907197bb. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZMEQ2461226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec9f01117b962ebe3a6e9497012624c5453c75fc287c9afaac9a5fe463fa4a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2482371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f87909d5f12bc9d2dfc5e14db6c623e752fc8341b45a6a4d79869d8dab7a28. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN32497158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c613fd1c2c03f354e0e10775107fc00ede221f0d3d1c1edbc85cad109950bd. 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/QZTBC2482372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d0d27afada35d1f894d5943041f1f930d5f814276fc7aff4b193ccdb5766c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTBC2482373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8730bdaca5fa53f5e6dbb1b8c80af23741665fc17660e44e1952e03e764f84. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:40:43Z), 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/QZTBC2482374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e130a502ea10ba24bd9be949b3b9ef4ba5b61dbff7270f556b2a55f46d265d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTBC2482375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33368dfa92460058f3ac4c37d069b0f5a5d33a6de3118f22b9f7e8f1073d63b3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTBC2482376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a680750b8236d6903bde72d5e4f225eb782f1adfd6015ab8e2493895d057f6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:12:28Z), 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/QZTBC2482377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec14717da23fb0e3ede0234375b955277b9dbd393ca8183e786505e9bdb8a98. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:54Z), 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/QZTBB2443453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd97942845d7859be7b0f3634f0d2f5d5f3a8306921a6783d2ffca84a31471. 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/QZFZ22534511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd97942845d7859be7b0f3634f0d2f5d5f3a8306921a6783d2ffca84a31471. 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/QZFZ22534511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486c5e43807f24cdb4586c8345c2df1d0eec4e526962cddb7ee67d60e1e29400. 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/QZES52555791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbe83695378d900747ac267f160ca51c4631f76e57025c41f9891b2db87953. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES52555792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514600446ca4242ecc096985d37f63c822c1d1f7855aa1eff52ff5541770ed6. 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/QZES52555793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be10f80d3f23fbe11e1d431e4c6aed559ab92190cc83fdae1a3260d278c406. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZES52555794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf482cb00c05252b0d19e17ff39c555b10e48fda8131a692b7e719efdc5231fd. 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/ES5152500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c074561095f2d061d2632f24c6900ab986147bd765a0d15cdbb060ece08f7. 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/QZHNA2383682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dc2f90375f3aa9bea799715d61713de1c183f6df4b79db840c69d52f62fbb8. 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/SE6QE2357708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e95be87a4ce76de880d387f92ee0077dee937ce36be2b7caec3667916be5858. 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/SE66N2210865.