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 0x87a6243657901425d0c6545a1271720123a328e07bb6131c0f47aef0512e6005. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/667f2ace-230b-4055-924b-e5b1831460f5.json and https://artists.proofprofile.net/proofs/artist/667f2ace-230b-4055-924b-e5b1831460f5.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 0x427d0a7a673291af449f716a98df05f19e5d536d02ffc457f9d524c37afa64bd. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/MXF019700794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c25dd8f2cccfd47d3a8ab21e6f31048a80ebb6876a705e136ed9d05b41677. 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/MXF015700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48aba152816f9b90c6ba8476912a6402d1a79b29bd55a2cb2c9b67ddf289142. 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/MXF019500903.
Vintage Music No. 87 - LP: Los Cuatro Hermanos Silva
Los Cuatro Hermanos Silva - Volumen Tres
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cd5b04e062cfe7db4722b111f9ae2f7bcee07a405e5f3255375e5ca01d47ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF016100540.
Estampas Musicales Los Cuatro Hermanos Silva
Enlaces los Cuatro Hermanos Silva y los Hermanos Reyes Con Teresita (with Teresita)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3beec27969a2e41d44ac90a36549c2eef38ec7b77eb200ebb081190fc3aa6. 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/CA5KR1927684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e0d6792b6037632a6992df4eccdccbdd66bb60b7df73033eea0ec05a39e15e. 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/CA5KR1927685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45178668a0c0c7badec9b31e75439e39664a381ceb3973266b5ed25694f4d4c3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CA5KR1927686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceee415dc22f29be9b2112c94e227cba51cbd487243cb7bf9811173608d444f5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CA5KR1927690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e95d5ae7d2692d4ccd847ae90648b4958f994cc544cb612ad81711e36f5f9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CA5KR1927692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc76e01adc451bd2ad6c491142cbb73650b0f2b9539d8a282ce548d7fdf27ae. 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/CA5KR1927694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c9e85692da1c5809a4322e8770f99d7a9c7d29e61ffdced01dd507d10a9ba. 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/CA5KR1927695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bf965d20482ca157ff5fb7edf86163403df682a0899e923ef4b0f1d38ca769. 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/CA5KR1927701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b38c9134c87c0410e17b049b323a1384cfbe716f7bcb9a784fbabefe37a6e. 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/CA5KR1927705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcfe1785b06cc03fe5270284a3090f926a3e93a3e09455bfa1a2308e7da5251. 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/CA5KR1927706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfcf681b41fa727469dddac4e508ab9ec65db32814b926d952096684481983. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CA5KR1927707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d5e5182541ddf62522237ed457820c36bc3a4a7e0bf9c4998a177498bf0bf. 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/CLBB25300001.