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 0x5aacec9ff7cb762bcd259fb93411e265631eaad0ffd346dce99ecbdd9590614e. 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/1d61d560-fa86-4eea-b213-9e21ffa6c8ef.json and https://artists.proofprofile.net/proofs/artist/1d61d560-fa86-4eea-b213-9e21ffa6c8ef.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 0xd56822f288ee3bf260f4473cc7c8945c1b858a8aca04d680fc394755fffb1380. 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/QZ4JJ1834641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2259bc8ddc65184b48250059b71a461669778172090eb925030b8d78bd68ab57. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNA2085569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2255067faeef77759ff2f05f5d46fa6f60491d11d531cacc89ede25995a06d. 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/QZK6F2176475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552af030fb1ff9d2a4604717e167bffd9410a790865626eba1afe137c921bcec. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6F2176479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61e6495457a944dacd9a0e4271d27016421ea7caa3f5b4f7e969a50a278f581. 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/AUMEV2454246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06cb1ef6236ec7936f2a4034c5ef70fcc1666cafe1277575922e1d29c0e5bcd. 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/AUMEV2461349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55156b1335bff794be53826ff5ff215cbc55074ed7523f1605722d540420cb5b. 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/AUMEV2462788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a81461d0f25e008adf016baed4e439a4c5f63e4ce91f02129d923198124b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUMEV2467727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2169301497226c69d7adc60bced2294ff3ea670df6fd59b2e28cc4e00bf3cb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUMEV2479660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94554bd0e1bfcd87c90bc3df284a5dc587c239730625f3d25ce4fba294c4b813. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZPLR2494487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea5c1767d7dbe77a2af0a9ef034ea0171ff90d2c049f510e6d128eefde82e3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP52400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec933b05ea9e40f86f94de43aa1635c005703171ee2bfd5c731279a06fc49c3b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB82415561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757e2e744d7cbe32e08924b5e8a469696ea177c5b384d2377b6c2918538ef0a8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUGBT2450167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b737c25b41a0f75749da3b348d627e09ea840dbda7ce882c33ba1ec93b4fd2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:17Z), 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/AUGBT2455991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c57f8030e22045f4b42b3e783002c63afece53b4864606a2443ca2ecfb07ba. 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/AUGBT2469418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8375275c442f993afdc8565ac537bf06033ec7ee3a5fb9450a1b5acb6bfe7. 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/AUGBT2486372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105bf40010dc5c1dc31b22f6b6e3cf50fc969cc259cd75231a28afa136869007. 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/UKEX32500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c20790b299d57928e377d07aa150a7d13728aa880a9eef1fa278f747ce5193. 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/UKEX32500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f661ece25acd48c863aebeb7e9bde09e6e031237c61490d254f38c52be708b. 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/SE66N2298313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213cf2081d8f541737f3a471c4dbceaea935531c6896f8281f3862ecd34b052. 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/AUQ9D2400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f264edebdc924683d3a27101ef37ddb31ab9097d3ecbc0ce49ae3b5c19c3ca2. 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/AUMEV2571830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef4af1ea18bce31f9fd66c70f92c48510220b16509fa84d1c086db385ca1a3. 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/QZZ792434132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7a4659b05987d79103fbbf226cf435ad87394b557fa66ca89cc2d1e11fd8be. 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/QZWFL2460846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8359bf5fb3f42b83f5b1b9962e50209062cbd9ec8151f6f5f3d4aeab2042166. 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/AUGBT2501066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f31420644e426bfba6a6a772c33c07199a8fbd47dcb096dcd6c451f3b64d02. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:06:24Z), 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/AUMEV2431782.
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 0xc466821879c74a0cc71f2aa5e378fffd5345238a16d996094c9b00cb1b7b4bc7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/AUMEV2552861.