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 0x0151a03dba3d6709e85fb21a55f803925af33af5fc0c4476b6b84c60cb2ffd1b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc05a1a7-03de-4e82-b1b6-a8de9c632110.json and https://artists.proofprofile.net/proofs/artist/fc05a1a7-03de-4e82-b1b6-a8de9c632110.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 0x38414fa86e93d8b91509af6f3b54f13658a7e9602183c9cc4a2763dea8b89d70. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA21855725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867ade0b1574e7d3bbebaeea625d45e1a805b83e8c04da37c28f72d317964f46. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA21855726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b046bc21d73dd6389162a36d6d5db8fa28429c9aa4f985b21afb5891b8b73d9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA21855727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d711d857a8271baf1620461289c4feaea026c63a19953bf96b7c760c1ea629d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:54:52Z), 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/GBMA21855728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9bb3739b3df4467ab3b731883b6e04a9f3fbffccae344d5d329fabee6bee92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA21855730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c5da4302c123daec02ab27af073036db78f040ad95a2643a75bc02c413b03. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBMA21855729.
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 0x9c07645cead98c691ee8817f97e15792b92e71cd6b2497b5e90990b4e881bedf. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBMA21855731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77049f2b52bcf989d12755baf5548780e6742ca2046ade14a3e40679b69a24cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARSWG1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71199e520a65d83cd6e9e2f5dd4d8a7d7e04c49c0d304306e9faa3f8771c15. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARSWG1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19de53d1423a5769516937b9bb660aabe7db512ede76bbeb25c4d6e47cbafe1. 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/ARSWG1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02906d2fabc6dd5ae806e791296b7d9b4874dde522bd69d85e6d0b1ab171deec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARSWG1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6abf015bf960c902d4eeb31ef5ed0948eedf75491c9f8bb9084f0ab9927f7d1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARSWG1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109ed24c6e922426e65a70873d41f3da385c4e066b1020bb81ca91790fc30dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARSWG1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41b15b478b311dc3bbba2fac47af3a4d0a9963b99411bbfeeb07b1c9d17816. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARSWG1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf041b5516b5c178f3519e98ae1ed5fee1ed34b6fb1d323c70aaee5fe7738dffc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARSWG1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f522d0e750e67dfb42f25ebdf2cead24a0c41294b7337627020237f635351. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ARSWG1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f76ff787af16f0f0e06a915be8f545484f4ad1ba46bc15ab1e937283c2fe35. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ARSWG1500009.