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 0x66e8f556c569a86a0a9d6211bebbee3a3e1293bf59b9ca70a82b1f174edbf032. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccca25f6-56fd-4a25-9fe0-bafadeb7271f.json and https://artists.proofprofile.net/proofs/artist/ccca25f6-56fd-4a25-9fe0-bafadeb7271f.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 0xd66b990778c6c090ec89e53cc6b22e77b04d2405bdbd6463cdff2e3e1db5cfa6. 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/BRAPI0302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe968f22040e8b4bfb4e7ddd71f0b8b53b655fc3701c2f7279b1bcdeae06a834e. 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/BRAPI0302085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d27922d49c92a60c77cc00cf4eedb53d94cde602e8c2752601a9e44e9160922. 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/BRAPI0302087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f19dd97d606dfe7c622b268e9043e43f74054b0ab939fe9af1b80006bb308f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRAPI0302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8553cdd20d951f009f2c26ff7333704d1aa7f3547f4172ef303c73b8601e3. 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/BRAPI0302104.
O Amor (Sobre Poema De Vladimir Maiakovski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b7b7118cb57a799e316be42c1f8c1506113baafca99e8bfce7d34a4b84cd6. 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/BRAPI0302096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66b990778c6c090ec89e53cc6b22e77b04d2405bdbd6463cdff2e3e1db5cfa6. 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/BRAPI0302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b7b7118cb57a799e316be42c1f8c1506113baafca99e8bfce7d34a4b84cd6. 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/BRAPI0302096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606211432cce8d4fe24ea21952fcc4e97ce32b4b235f86a9df694a978f930af3. 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/BRAPI0100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc294a03d3b3ea17cc48b54d70d401fe07e47a339a3bf85b03017e1860571917. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRAPI0302088.
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 0x91796194d3b9d6ae4c2e877a18c21fb877c8b0d95f5770a40275d4ddb6938cd1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRAPI0302094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b99bce331e62193d9e99c6b18223666d310636b5af7cf0e3b0c0a8ced2142c. 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/BRAPI0302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f8962f906954bcd8368f2b8f94d7e3b386c82a1833e55cfea53c8a2fb096bb. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BRAPI0302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd5024eae12a37de5343dd94efee8f9d0e0a811094cc7fe2ca06bff33f5f1c6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRAPI0302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f452fece7499ac8bf3db388a7d90839bcb85daaa2ac2fc5d3e628ca07559da. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BRAPI0302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3460fc8d11b78f71f005bd16ab7cf2abb11f67506716fe44120f3ae675605177. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRAPI0302105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d1f380daa6f09a5e9ca44a82e88d1491477cd69b4e6b3745dc22f60a450744. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRAPI0302095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4caa161b7e9e4d7969a94e535abd7e84510863f955039c97e5942009adc223f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRAPI0302101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e915b8c23e0d633b72a4d644418736312d2d6026280f874b76bf201e90169a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRAPI0100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4c2aa588520936408713f51145d19634345c85c2d7f82be8b2df3a0c4a948. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRAPI0100037.