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 0x579720feacc9c263d8016ba14070d61bd1326901fe12c59fe946b979ef88bdf7. 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/15f473f3-8ec2-4f14-b363-7deece246725.json and https://artists.proofprofile.net/proofs/artist/15f473f3-8ec2-4f14-b363-7deece246725.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 0x15dbc764f0093b96cf61bac76edc7372384a2eca3f3e3b921d30facfd03061b1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZW9M2295933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324797359c635aaa28be6053c678786fc612e91c858d832c0ea7d1cd19a98f39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9M2295935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ccca29ea847b4aeda300cf9904d029b0ff85d5b12f8e456f1333a557829d32. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9M2295936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4285cb43ed4e6fb06eb5c364250ecc01ac9acdb47e68a55d5bae1aba97524ff. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZW9M2295937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857de30ca5bc98c27f1f0d0faf4def22e6568f0d3681eb457b3d672e230e7214. 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/QZW9M2295938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f23397d6e66d950126ef83d848e0212ffd63f57b105c0ad59dd42281d01cd6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ARF098800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33caa5bf65b092e2cfa795c3f2ebeacab3db0e8f96c461bbe2101a609799d7b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZW9M2295939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80ea193d6b4932838d7d13ac3c73ca375c348fa05551ca3ad5b46ef0c1493c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF098600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852829edc5e662ab463bf03cf2284d64aeaddd00791dfeab228b82ce092f689f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9M2295940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfba346cc888c35fd5c22b2017de58bd257a73596319aacb28f58932f1419c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ARF098700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e0b4e50a6f2997a95f34c3e76d989eb360082f5c8bc70460a3e3f5d956430. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARF098800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9fb4d41af1c7d6ac76413393cbbd36c1343c4d2c8189db1130fa2119c2f01f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARF079201882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7059eec3533ab64dacc707659bc24ec921d808f2a762f42a06d288be8e994. 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/QZGLM2314889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc4be49fbbc970aede86ae56053b1c3e85ef559fd62e49a4f0599f89601afb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ARF079701862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49539b4cdd7a8ce7e8e14ccc0fcd0d8af64498af70e1f991f5383fcb5e7a6660. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMFME1477784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb12fb0e01415444082e020bcac00675b88de7376b91477bd439b308c1f3fd. 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/USANG1920044.