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 0x656df22ddb6f9722684d16833e2f2fe4f1a80bd3847a23164ad8175a4f395bfb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2755fa93-68b7-4b82-8a48-b3aab0abdc8c.json and https://artists.proofprofile.net/proofs/artist/2755fa93-68b7-4b82-8a48-b3aab0abdc8c.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 0x3a0e3bb2a719ed417bd70b1abf078e3b0f8b254c7aa6e73f8f027f56a1f3c095. 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/BR0AX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb7f7e480170465358e90af9ea25c8192c62b3a96d5f8b12059ce279ad93758. 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/DEBE72400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5aacac5631e44b75d4023906a9f039f641b89acbfa48e49bcaa5416e964a3. 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/BRCWZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd77650e899cac2016c84b320d5ef0d6b19789ae8fd65d0de9dd8a4f4fecf556. 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/TCADU1857165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324b9b4490349ca5039e127953756a90e198908c596d24d2b1e3eeec3199cc97. 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/TCADU1857171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c363660ff0b1644e7658f5b51905581a736df1dc60861f06066335ad1ab55e0. 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/TCADU1857468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf006839f3073492cc57d6c1591ec2a710b95d19036d4e1c90302c10feaffc174. 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/TCADU1857474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786dd63d84ad390e52068788f87ba24e32f2651198a54b658df6c2eaf55c3db4. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/TCADU1857477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692cdc99353b1a1b1e9d52c03557f0f93457a0e5d1961e05e92808bc7514998. 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/TCADU1857487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890ec6ef81189eabd7306f1a0368b172046bbb5eba0c45b19a4b5f4c5b81d93e. 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/TCADU1857490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe598ed2969e5d39a11f3f2761f52740a93dd499d451e317656d80d19084206c9. 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/BRCWZ1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd031684929ff33ef6ebd52267deec1604191f86827128fb8e6e7f482fcc61a3d. 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/BRCWZ1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48425a4410e53d00ca92fcca29c66c40bccd731fbeadf301ec60de3e88f54c13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRCWZ1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01563974f0a8afdec2986c0fc06939632c11c75428fa104f545719010f95eebf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRCWZ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6adc7fcf347469132d8382c5020f66706f3a92094d22c0bcc0899147aec608. 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/BRCWZ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68582278198e6d2c1c879f5fb017624ea7a92ffe1fcbee74a1574d695618dba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRCWZ1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fa2284b8d1ad4b460f2a36e3ab50c825d8508301c324335a2f9f9f808e6ba5. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCADU1857472.
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 0x50af18bc3984967eb5f072c9917fce33ae99e0880bae90187eb62d4492d6d031. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADU1857496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87599674b308abb0859efc82ebac7845f317c54c981f210591dc25d359a5b55f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCADU1857501.