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 0xcb3725401fd7378f838e399438d9894bd72776708cba4a9fbe32ddc50a471031. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26c16d84-eefc-4f3b-bd4f-ffecdd61293a.json and https://artists.proofprofile.net/proofs/artist/26c16d84-eefc-4f3b-bd4f-ffecdd61293a.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 0x089a9174b48634e3982212b2d32776675c0f269edbd5128e0c0fd9dcbfc96d05. 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/QZHN42549176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f98e02cb911e1a3aa808d2a2feefd1eba44e68908c3ec777068252fdefe760. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:36:16Z), 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/QZHN42549177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b46be3f9ee13c6e47302c6d83e09b09a94cebf4133d3abd1a98ff3a321e6e. 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/QZHN42549178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0886ed0959383d0a60b0b5fc51aa780e66f0ccde275cfe085c026f67e98f22af. 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/QZHN42549179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62e2c331dde7764dec429b02528adeb79f80c2396d7826ee37db173410324d. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHN42549180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde539987c1a893c0ba9cda03f8285c69834cb72c17d42899319d267d0a563edb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN42549181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d119905af854abc846ce92c0620a329bdfb5f202e8e2aa5ce43a08a965098eb. 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/QZHN42549182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bfbcac1a6a8a97489e46b8c4245380d1c56d30471c2aec47fafd2608244da8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN42549183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d4da3143f022dcb0da45365e25e900cd3964b0678424b9ff581c64d05dcf7. 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/QZHN42549184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8322d0cd5b6718ab7afbae98515f5cfedf6ee4067341bf1189ce03e352ab6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN42549185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3525978fca90146d19428d69d9b2c45f85845d54df8ef8c21bbf0e9e726a6359. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2583118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e44bfac558c64d84da5dbf61a5b1e6544d289f29695827339cb299372032a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:42Z), 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/QZMEM2583119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcf52040fef6eb388bfad39a0bc86a752ba10ac4e8d769412c6140f37221c33. 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/QZMEM2583120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425336a9b3fd2fe190d618371b57967d9d890bc48b5fb9d86135441c30289d4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2583121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad138b7bb7893567aeb6953f863ce20368060d40c4709e376fb349b5ce1cbef. 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/QZMEM2583122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9441dab6bf945dd8d0e0d8f2d2a27d8c26d93d2fd69e84a5b8efa6c62ae0c88b. 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/QZMEM2583123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fda69ec0e3832e1b80e60dfd48340add227b2871231c476eb092923357e264. 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/QZMEM2583124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f6fdada321598670fbb941ca0a7aee0b70c15110787720f24fead23e5fb971. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:35Z), 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/QZMEM2583125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c20ffd91e8dc30cf043dd5c65a25845b9535b19489516fc62c521cfca339af. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:44Z), 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/QZMEM2583126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4728667f2e0dd6b639a85e526fb9a08eb17a34876d06cf9fc23800b0d5048. 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/QZMEM2583127.