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 0xd032e18011e77f90bbd98593881db3a2731364f1c1b62fdf43ce8757634b674b. 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/935e6978-86db-444f-b935-4999cc194b39.json and https://artists.proofprofile.net/proofs/artist/935e6978-86db-444f-b935-4999cc194b39.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 0x03b097dd13e6383758a9ecac5a601d4e6ac12e509deab05f1c27e9d7146fb640. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:15:22Z), 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/QZNN22354627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ff9436daa887d5c20ab679a94a5bd6ee4f34336c5f403a9137f4e00b73ac2b. 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/QZNWW2450789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d88538127c1e7a8d969c7f17980a8b3e1790fa03deae2b6478db812b02e39ff. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QZNMU2483016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7302d36040c929e1cd4f5c3498a1fa543089c9c4b90b12b14c72dffffe6b08. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNMV2499879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935d7a7a6b5882b96c8f351d2468bdd649b31f50f99da69541ef2a05f13d5e8d. 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/QZNMX2444963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084eb1622773d750a60fa2f33ae545ca7a8d1d993ff18ebf3b7501d11e477e92. 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/QZZ7N2445700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06dd613bc341cdbd10f3737a6071a57ec8260984c7f12bf6ba2cb1fcb97e310. 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/QZNMZ2406504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23860b2c532dfadf26c8b077c8a7d326c610f6e8edb7260acb3ceeb5741f9ded. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:48Z), 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/QZFZ62510980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4481b4980f83f0d6dbbd769bd72adb8f5c4d224c6aff6e9dafbe1b12f66debfc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:11Z), 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/CH7819577537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277e0e161c60fe4e8ed89aa237704e5793ebf4b726de60dfb387d140d426325c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZJG52550418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a0580cdebf0d3b38ffb31ee7eeaef696bb192e8475171dd63a57eecf7afac. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZLL92508371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d674893847738b3ef850f7c630027744ef68169091e529c8a30eb3096ced229. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEV2543029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c5e549f6d40db434437f32130929491cd11bdf092089ae9d0fe64cdf1ae2e1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMWW2555359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed7bcc640b7af23afdb0d89d8f128102a653f19704fc3ada0ed30dfac50943. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWY2535017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084647185617a4fbca90cef3a4b06d5b01ded38f53fb4757f53b2f0dd095fda4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNB82519560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8928e4c796fd929326768bd02639e3a3cd8573c397a6c00bd478fccc96281dc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:25Z), 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/QZTAT2503812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68992ff5846afb52d7db2fe7b0066a6d0d90cb809b4c09b288fd356bbc665c81. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNMT2505744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20dbd8e098e7f35c777caeb0f823fbc65725fbfc99c4ca927b4e8baa917ad9. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNMV2514030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249aa3ef6aa7e57684a48ac9c5f8e663e925728b8c5f37f50b6b4db7d1cf7c5f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:32Z), 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/QZNMW2524693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5982a9e8d8a4fc83644dbfbfca6633707b1d739fe3cb529a2d7d12884b86c8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNMX2579129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382fc1bd33873c6e0375e5b8d9aa9216f4dc624e1731cfa369a08de3f072f152. 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/QZDA82465922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf548e2deecbdb7655f931f7f1b644048b653205d1c6470d42cafa1806c0b49f0. 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/QZDA82454046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c4a685d5fb3607d34b2944d05eb96bc9953092e831cdf74207ad1c1276c106. 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/QZK6K2368725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaceb2f3d1724f53308daa256944b25683b3ec910ecba0665165bc8d8445f037. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:57Z), 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/QZTAX2475020.
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 0x7d0924e875d5fb8ab38f8fbe2cfe1dc9427136458dbaaa4b8fb27a856c893b1d. 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/QZK6H2452090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29621dc23f801dd2dfd55514186c2a8781f8d1ec50501a87898b68edafba5a52. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZDA82460043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248f826661b216a646c0c3c741e64c3d8f23b7aac5a30784c807b532635a968d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWQ2269023.