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 0xb3d5f051a4872bfafd2de5d9706a5509f69413dac926a7c70cabf5744acc835b. 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/7a1f3050-4aaa-4223-b075-630a2b75c97a.json and https://artists.proofprofile.net/proofs/artist/7a1f3050-4aaa-4223-b075-630a2b75c97a.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 0x1515ef917d3d1d96ee1dc0d5bb664a6abb51949f6916d23ee7f42af96314a3e6. 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/BXJLK2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c59f165e8d68ef31d852577e5668eb7d6ef9cf94930a75eba155c00b22c93. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BXJLK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed38c7dea904e72667d9cee3448f8e7f09419a49a050fea48060e212eb86906e. 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/BXJLK2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbd1ef6c3f3b03046993e2c32a6ca85965739cb77c4ed7a7089cc0a85d17ba8. 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/BCHYR2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f4bbfc93c4fbb14d44df98d41267985d8f2d44426a34c26aadea278df3c857. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:59Z), 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/BCHYR2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad9ee6eb8add198c52da87150e46f33b6017043cf6b810be7d8ef49b6c2f50e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:49Z), 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/BCHYR2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9de655c03a2e024bc4df7b2d470f649232573a27dbbff9e05fec24c3d1d759. 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/QZES92497960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f08914081f9cd9a138f7ff9a69b708996e72ccb59e51d60d2b02821467d9d3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:44Z), 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/QZK6K2425584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee366c5b759e991891090bef43f92b579edd46e80c4716924654f86ed14ee19. 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/BCHYR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd036cdd68a4b56decb2c31597d32a9557f653e9c9b2e96bfb814428f21ec422a. 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/BCHYR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9227596bfb38dec7effd5efb49faa9a18a580540727b8ccf334fb1dc2a64f9. 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/BCHYR2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57706469a0e6923d41972d3cd37a461ed64fb44a45305cbc94620e414f6aac5f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB72418231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a22c07992ec12bf38087d40f79cc887b5c1542a50f3f944230853085cb2f6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AEA3A2231129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886a986393ad6e56c89e342d5250c4b340eee8f387038c46188d62741351821. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AEA3A2292688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c559dfb3a4583bc8556a3188ffc3aa8c52ee579fef0cdf46583a1c039c0f0e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7R2409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ec35c486897f100b45379269b18b4153ec798c54a139d74e0ca89c27f15d5. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZZ7W2436519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff10e49a41c0d3f8b038370de02c9a941ba6530935e6c99bfea9062c1a0be7. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZHN42516197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ec7a8a3b09b84fde0eb06e6fa317f336ca892161f3732a18ae2b437b0a11fd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:01:14Z), 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/QZHN82524998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e760c48a127287bd9644ab5399074c3371a17facd892f91a3f226ec51e34fde. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHNC2576858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b546fd9838a4f409bf8817ea6f0d3f4a0edd5071e15621309107ccb8096335. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:47Z), 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/QZK6G2576422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987f1aef100947d70a83673ff8bb2e2b14a01a5ca785120bc5a4719a0d15e46. 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/QZRP42564751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d6cee300774ae7c0624ae96db6c54a993fbdde2f9241c98537177b511edb1e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAY2548820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d74a8dd42ad985dc5da64e5bd272253502479800a4e1790ef2fc2ebea94542. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7Q2587046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119ea540779733abea1495652b543feb1e0e92ce18dbcd702ccce3e275c09d95. 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/QZZ7Q2587047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9ce3d007b40045d02626c50e23ea7680ac7050d19b737a923c810c7a17e723. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7Q2587048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6976daca881a6fb8be3317c6785de2704936e62b2bcb4d18010ebc09f554eb3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7X2508076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d2b0e5392878e43b573b94710e8916c2b5c4b90292a22ccbc3d2d8a2b17ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7X2508077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f426b08b002ab841443347b124517668ca3373029d09da1ee6f0a24481c3e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZZ7X2508078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e0190d57d8e30da23231fb6e775778b99b2756d306f4abd696f7f0af55800b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJZ2599669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a8412b31948a148169688d360a73a80a9cb5363eefbc2ea851751ee915eed. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BCZ582500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc3915983b4e9c018870fedfc13ca448ff794982f3894b4b9a8dacd2370fc7b. 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/QZWBE2253034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c2b7c70070444cb71ead8f0679a425ecd99a6bea2b6dbeba8469657e04fe54. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEQ2241836.
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