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 0x0f31f608455615abaa055f9b25f0b108d6ed52c73a3f233d4e97235f14affcf5. 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/60ecc08d-b379-4587-88a8-5ad01e917d9c.json and https://artists.proofprofile.net/proofs/artist/60ecc08d-b379-4587-88a8-5ad01e917d9c.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 0x4285576c15ffdfbeebaa468696fe48a7d9cdf1cf07e2fd24504a7b02236b7e95. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMWW2494779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb470ba376eeffc7c70d42afece4550353ff2505ee7858c6fa85ee7c97b690133. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB22409391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb16609ebc797d025e7cdb2a1c37ed746febdcdb1cd7ea6e8814f7d29926a839. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:12Z), 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/QZTBE2452792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50159b4d3234a4b9a64d18bb35ef536f1ca14418a82884f7a7b71f9b8e372652. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:37Z), 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/QZWFF2483372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd3aef6b525164f95cee0957ba35770b41d6a0fca947974a0f7287be497f700. 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/QZWFH2433331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a89afdcdf90b44049d5f5985ff74387f4cf525a12213c370989a370fe317e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:22Z), 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/QZWFU2475193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf708a8bedfbd08cfb549bd6a026f529df247a9e3f3f06b9f5c3df6107f8ddfb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ792453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c8609528dce7be2f488c39859b802e802c9467e5ea366ba48e7acbe5bf6ec2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZLL92551457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd236ddd784cc5f7b6ec789b5d34b4b5e5ef393aa0f7321fdab6e9a31cd1123c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:48Z), 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/QZMEV2576025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe13debbcf517c4bcbc2130882270766a0e31cf34bca5f5dd3e4df0add8f137. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEV2576027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b34b6ec205025836e1501511344b6179491a5a0a102d1510a2a48719f20213. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEV2576028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e7ef28feca810a84315b33f200949f162f449c6e2b0335a79931019d87e4a. 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/QZMEV2576031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47352dba10fb1dc6c5e9f250a3b5590455df19fa8d84927d940e501cd29f58c4. 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/QZMEV2576032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbae23a5d6e37814557de4136358f34e50766e4b09730f6690edc668199f91f6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNB82554585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f9eda726bf4533fcb22e3cf0796295316dfc13470d2e44e6cec07574b74f66. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNB82593966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655dc0a29afd44f3bc577b0d2d7899eb205587f4c0bdaaac8ada69c98502fb20. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNMU2544593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6a2272cd5ccb047943d6e2b4e67257a34b3f80434442447ebb5b3f0ef1136. 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/QZNMX2523467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b4ebd895fabb97738c7511ee4e3b0d6ebf45c66fd272eaf6f5398646044eb7. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZNMX2575472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40188cb2b71036c2e9f1add5429cbb65cfff3addcb36c9e577b6755de28445a1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:03:27Z), 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/QZNMZ2500195.