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 0xdc5944a9cfdb79dd8dfc8ef6156e979ef174802580852fb44e580a43057e33f3. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a7f66ac-64f9-4ac9-9063-fa4bcf4b1b2f.json and https://artists.proofprofile.net/proofs/artist/3a7f66ac-64f9-4ac9-9063-fa4bcf4b1b2f.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 0xdf0963fffe73b0bd19c2785713e252e70a7c06a7f54c962d06114f46c8931c05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121600311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3abb2f5b79ce1902a0ae9313a75dab161784ed8eca622d9b139cddf734575d. 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/UYM121600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46c207b891c12004f87e1b96fdfb3468d38c428d384d8d105f93d5f0b10aa7a. 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/UYM121602753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2512b0e4cfd23cdcf79cc1d17ea8864621243bbb9ab07969161c24a62f0f7. 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/UYM121600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc790b7cd24ebdee653ed603d302e25f7af20799cdbc3cb80951ff42a6189e60. 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/UYM121602757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be4da1c434ab291d17b83286406729cad7dcdc708d22130f3ce46754852604. 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/UYM121602758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0915cf946e2177437d4472c56d4423556dad0fff5d8624f076238f0bf56a8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UYM121602762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aebc2cd244d2f544ac0f47065a990fe052c273a69a6b5cfa54a5b4039bd0423. 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/UYM121602767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192c506c629b39a5b49df2afafa824dad4de2825390efd370a351c62a1faa2db. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UYM121602763.
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 0x8cd2b4880eb467855b2d668098a484f6e5186b3537e19ef99b4877e6b7e9f417. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121203053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c7d1b5302c2447976f65211f856ab1f2371067e3c472c02cb657e4c228fc9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121203057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32cfbf9e0d4cb377ff4482c0aab3016d95fe66eae98db7270d6aae93df879ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UYM121203062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268dd2f087ef6579b0c825384656ad4cddcbbd88060de7da3aab6d876f0e6ae. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UYM121203063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d6c7518fee5f3ae9144143d6760cf55f3f39c41d9573e9496c5af05849a792. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:55Z), 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/UYM121203052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c2f829352cf3a362b7be8c4857e439926a35856281ff652de1c2d0a7f0b099. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/UYM121203051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd703b77751d535f93ab5e36a8842b5e2e39d23c182a5128b90e08de9f8bb21. 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/UYM121201751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840df37f1bbcd44825eab96b55ff32c1b89f6bbea7a216a42a368b4063dced97. 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/UYM121201771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861892d3b7c47013d05539b3296c9cb38c13aa5bee974ee37174cfd6688e9e98. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UYM121201758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996873598fdfcf06f8b56821e92b86d84c09c0c5cec5ae66877a2ebf5565c5d. 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/UYM121201776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddea968d885804cbdd13616a0b8c45b7225f1850e7cdf3c40df7f7cb085ce50. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UYM121201779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b6c104fe22baee3197590c2b87aeabd16356b5eb2a50e2cca7561e3e7ffe9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UYM121201759.