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 0x4a894bbaba32cab1419ebc7c4763c5c90e76261ded21bc432414575e4e870e23. 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/1ad48327-a1d7-4c33-a2fd-82d3a55e3d24.json and https://artists.proofprofile.net/proofs/artist/1ad48327-a1d7-4c33-a2fd-82d3a55e3d24.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 0xc6d346d3e8a8411c69fa2cdf5703a8d25f6bf4a9fac2615b4f88dc2a1834d5ab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ662302146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdbdcfde938decb5b26c0e7fc763b6b0ad6bf13711caf6d372954830df44444. 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/QZZ662302147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911a9a3704ca232a9433c844691e27705d1f85b3be4cb67d946b11682cd2ba5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ662302148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd648adf69a0f0c7c5e4cf23a2e5e45242fa775f7f296c7d25c0b797cf7ee42e6. 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/QZZ662302149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffacb6f3a66876a066edd100fed13125f66665400c137dd59850de413b17781b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZYFZ2360949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0303f0cf5384807c6994bceeac9fb9223da4c2db9f95a057b2a61328ff45cd. 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/QZZ662302150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c325fdfb5afaf341ec15dafeb6afaa74ebe3ba27d604eaef9f869d2c67b91a. 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/QZZ662302151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571204d427073405ce4d6ae4edf7ec36eba1d4be401462ba640be5767b4a9e71. 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/QZZ662302152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651c480cec8d7364722ef25d3902b162e754910cf5e6fa567854661719d2b8e7. 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/QZYFZ2340520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bec7a105c049af5d0b9c7fd4972645180084020ba8a6f555647786a6592484. 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/QZWDW2420349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d45e9dd8f5bade9095131bbf961b15221deb61b4330e9f6353b14cb6a2277f. 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/QZZ662444916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3288d4370ee143213f792984f8bd87fde13cc6ffb1f8b2f2f86a5e6cd88378. 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/QZZ662439684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc699815fc1798be79451446d9d77790a156335f017596ae241440daf8295d. 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/QZZ662403530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f95fd02a40f6d117c488aff086d4c130ca5b6cc3f975a30b4aefddff011eca. 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/QZYFZ2367631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa26da805c8766e618c9ba3e70462db321e134e3dce665fc24f787b6a02fea. 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/QZDA42305517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1d51cc103a35a7e2886baed8f3c5de5361169e0199ddfaca40b5dde639220f. 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/QZTB82285832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07de37221f1a1125094cdc1e8032c36b25794b3c4d37217b61c04f3f95c626d. 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/CH7812100787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46190bb23f509524d7dca68fef15994e5de40e0fe1d0568eca12be977aac0292. 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/QZN882130418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e8067b00113dbf6b23b0a5e446ca2a5107bd36aa9910cfc4721953f5a20cd. 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/USDY42136416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090cf16ba116ce80ea1fe75193f77aa5c419c389ed04b5099042710e6ec65e0. 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/USCGJ2084478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8612ecbc5ef3027e00c7f71ddee0ac00fcd63409ee90aad3b21c803ebd56c1d9. 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/USCGJ2084479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d4ce0020abec51732413502329bbabf9c7857f36abd252b566cf41c9983c34. 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/USCGJ2084480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed5cb0be79fc1a3f8cf7ebb586e2c1a84acc7b003f1da2490d5ba021211aa0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ2084481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f51c1842fd049a1ff33b6b4f0d3e476fb6e0d81d7b3c0217f08aed7efa0f304. 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/USCGJ2084482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b441a95e51cbdae7c922a1bb5d0944f6bdb5cb1f42f7f96975ee7c3daf9f1. 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/USCGJ2084483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec700ed61691749c58f143c6961f13d99df596669a81a00e0460a87e68406e. 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/USCGJ2084484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c26c9d6f78ac96c141e86267bb1a5f016db5f9dae8d20417716b4e67c7f13a7. 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/USCGJ2084485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87bd0fcf3eb92584468d20e99fd1f8e60963d4d50cdd39111a12f4e408278ee. 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/USCGJ2084486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f4a4ee01b57590a491d31c08aacb97f8d2ae4d59994602182e25f5130dbec9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA42035115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e72483294800540840363d316d82261c7b146b0b741cf67a2e091c177f08ef. 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/USCGJ2111085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c3bbd25800923a791e716f8479c4b6b116bff4f30ad69c1eaecc4aab08c57d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:55:40Z), 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/USCGJ2111088.
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 0x1e210d5381d87f61783acf1e440b25e8a2c4966b62c324df5ca7501158ab875d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGJ2111091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3064bd8b270a05a606fbfd5eb2dad4e820d91adf0506b4f186ca53c4772446. 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/CH7812179069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a92f0d9f4ba17a834e9a51041530bfcd0e3b7dfb82c917e334367c9d7173d. 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/CH7812179071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ead0b16abca84c83733a3b660f6abde4cc90ae0ad73864fb551bd9164e542. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH7812179070.