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 0x78dc818c1b235ddc57e5c7ccee7891c50aca6227c3d80a9a08888525911ba1dd. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f77a1595-79fc-4330-9840-55091ee2a8ce.json and https://artists.proofprofile.net/proofs/artist/f77a1595-79fc-4330-9840-55091ee2a8ce.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 0xe137f321636a45f9883883b539278dc9e11a2a2894f338fdaa5cf8b7cf99139e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/MX3192406565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137f321636a45f9883883b539278dc9e11a2a2894f338fdaa5cf8b7cf99139e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MX3192406565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd83ea6dc228c7088162761149d0999d831462ec4edb00b82c3e28947315ffa. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:44:21Z), 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/USGH80710549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77c285e02c7cedde0e1a108d6a35abc27979d8a2474b4af4a1a2741eee7ee7. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USGH80710556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f35ecf65a29ef76f5c20ce8849197031955230d9e90b3eac02547ea1179e1. 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/USGH80710558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ed701b8855e1b9bfc7579dd0b4e8746a22629c0e0c482967ee1b892a59b7c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USGH80710562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47db40fe2c4f0f4a7464ff592b3d4b437f9a577336b331934bcf1a7b06153d. 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/USGH80710566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1f760d2fc37846ec1568d7cabd3d94530949c99fbca891cba69cdeb2db2c5f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USGH80710568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe38b2d55194c37d105d09d2f660c09a35081159313fadde396eea72f02b5478. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:34:42Z), 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/USGH80710783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad783dd09db7c59666d6af46258a2abee24b440ecfea3bdd71e0d9528657b2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGH80710786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e829c6626604979b7b58e93b2bbbc460172eabe132d6d5e1a38018a2624a1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:05Z), 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/USGH80710789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1597e589a2df25cfdfb74185c414a9ed43bcdb500edf2c38d2821ee188f71. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USGH80710791.