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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228427bc9de8936a2917a848618e5948945fc6cecc4a25e1717b104241ba2854. 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/1550b810-117e-4833-a672-fabc4a73a5da.json and https://artists.proofprofile.net/proofs/artist/1550b810-117e-4833-a672-fabc4a73a5da.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e19227b4d83eb8aec13e8f477b2ba6c80c089faf08e229cf8b7ec036e96473. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZPXF2120775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63da75f1fb975fada160fb17d80cd4168558a49f6fe37f77fd72be1fce8561ea. 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/QZPXF2120786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08799b7cc5fab93f22af33e568652b326080d50447da484e2da96d7c44886bc. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZPXF2120788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7533a605e36e3daab1f982499253b8ce8142b318bbf19841433fabb729f88db. 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/QZPXF2120790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf515dc986b99648a0dfe6c4a4649769acd65e775c4456fe920699f45c14cc348. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZPXF2120798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b525e4aa7fcadffef091362111c446637895f43a8a3735f9fbc7a089cae5db. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZPXF2120772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83724234cd7eb42379c0d038ece09eda234aebf9954fef8ee2c9b744c376172e. 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/QZPXF2120770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30842920bb3ab3284d049db66121995ad34885d345d9b0607175c19ac1090c4c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPXF2120776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c093ea9861b35de6be86d263c739b67ff6335848e1c8dce39e3a945179145a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZPXF2120777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba45b27a2a8cf73c8f443b684ff3fdd4bea7aa4936df024288188444f13e427e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZPXF2120779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21268c4f2f2954ef291da66c1712cb4b62cc25d809c53b432588abe0c0157cb7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USHM82023717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ade4bd816adc3dc32a5d7c8f4650d2b5d177ed5602f43b6d5fc3481f80294. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2031160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e655d1bc9bea19af368f7ee8df7b5496e3f7cdb1ea2897416688b754176e68f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZPXF2120759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318adca37567d420e4f46d54fd5af86de21e8108b6eabf26a184a7f44c53866b. 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/QZNWX2050491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edbeee2aa3659f54750173548c9acaec21418607d81da615fbdf33378346a29. 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/QZDA72125279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e95142b610b9e3f7f6c07696627df418baf512e14b534cd9b2d0c6b83ca10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZN882260555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad28ed66d77b710fad7b8f57ae814d3e0a423f70a8be6ba9a4770d96a03f72f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY42405964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bcd2ab1669c6d3fc7ded6d5569e413bf8e38eca6a27273f4c5d3864662059. 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/USL4R2451656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eed6cf93563c31251c66c2265df254fd4bedd17bf64c85bc3a802de305228fe. 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/USL4R2451659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cae8c03bd8e9679b224cb37cb23ec3da7ce3a71323e48aba3787c2716d2dcb. 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/QZTBC2412615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485987d493f8afe2292a1e945e820b3e90be85d3da90252449a9bba1b1c12d18. 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/INS922100643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575ceafcb6532c2c87c6bb6a3379ffc080a07d672281bc529b79bcfb7b0b8e9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW2244598.