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 0x77892c7e161c8d3e25612b534ba4de2b5a780839ced0edaa6557e6a81aad4aa7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea5eea4b-3d93-4382-98b2-4627377f8149.json and https://artists.proofprofile.net/proofs/artist/ea5eea4b-3d93-4382-98b2-4627377f8149.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 0x4785875b1cc51f38bb988f0961f6b8f235f74dcdc72a92a31fec9911cbb76224. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QBSMB2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d3bd24e7c6e3827ce2cfb29ba5f11795b478a83c280fc96624847b6d4fae9. 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/QZSMB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4e381d77a59914eac9e07104ee98084a4b014d3453d54c183385566a99821b. 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/QZSMB2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d4cdb1b2424a50f27813ec22fac106e53c6110dcbaafa6dedee2ba7784743. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZSMB2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e538396714da9dbf17f95943d5ab19c1364ae52d3247273079040f615fc32e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZSMB2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8730c6ce63e981fd005a9c270d9ff61b1aa40f017fd7fae1ea5d9f3ec9dae4. 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/QZSMB2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628de17077902e48e547000da67c1ebba45541fa7ba3af8472c72159679ed845. 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/QZSMB2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9bad0f5d7b1ff36a6e4fd3ebdc7325f142e01da418b71a2862f95ccfcb2fa5. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:08:16Z), 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/QZSMB2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8642a5b38219a0fe8bf27fc435e178cff9dade87408dd18e070fc21221a1ca. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZSMB2100003.
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 0x9a962969ae9e35d863298b49570a5930e48999ae58015dbf5b979aa7b1cafff1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZSMB2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec304e77838ca97b144b09cebbf0174b3faae49ea5ca066674a7bbddb249b9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZSMB2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2e22a7a077c98270112b8efa5a4db0878c0f291b4b9b7e1e53eeebd35fb410. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZSMB2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc574a5b2eee9bda202c6cbb95b6c7514740b44059f9b430b4663300742cadcf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZSMB2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4173098f2171483b987263ef61dae24109098dc8abd226d33f4478ba80fb53. 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/QZSMB2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec380799626f942f6f6e082607c80acdf3ebcc75cdb3003ffae0e8e93ac261c. 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/QZSMB2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5addf3471d05e6f2d133cd71a1a954577f6b36302cb2c7290d28bceef95b25a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USFVZ2491303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3014045c0a00266df8b976f7644740ab8b260c0f93271f90b335fccedac88f. 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/USFVZ2491305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c5ba205fe47c03013f1b58eadd229e55e8b20d3ab37aaee1ca951ebe3c3344. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:44Z), 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/USFVZ2491309.