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 0x453a04052e250aca7b4fe2680a1281d681a991d98b991e2008edc39b21e7e8c2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f181acb7-e57c-4912-994a-c817c38aebc8.json and https://artists.proofprofile.net/proofs/artist/f181acb7-e57c-4912-994a-c817c38aebc8.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 0xabf8f9a042b03ccdb4379c50ab75e1f8ef3eb73d03d1a85849475c68db9e75b0. 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/QMDA62306819.
Masters en Parranda (Colombian Pop Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3b52f779e457281db16230e281874acb72b97ffa5ce9ddf0cc50b61a5c89f. 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/QMDA62188735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235baccfc5c0f161dbfea9a08aa4cc1dcf53c908d1418430aae8db3eecb5ef9. 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/QMDA72145923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4758a5a038d4af5b9c7c2ce5beb4e9a381cfd0f39beca086df7a556e8a55f2. 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/QMDA72145945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809765ea67dace16091a162545531532c55bbd1552131911ef982e79163fec65. 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/QMDA72145965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f323884ff366a08de4b46120090f449a24d6052157acf48edbd74e66c3ae11. 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/QMDA72145977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2125ab972466d3fd0455e465793da8614cbe17dde60a040ee3c8d3bd4d219e71. 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/USDY42298593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95512bcb5a93756c73689add1a70f9d382ddb5f5d506478ceb4a1e6b993ef2f. 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/GBRKQ2317742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe944ea3c39a9ff8dceab5a4939cd713b34fb0ef396cd418c590272ed36cd1411. 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/COUM70600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680fe20c7f4b40bf8f96116f393fbd7eb5e2ccf328d11e6bde73762d2bbd405e. 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/COUM70600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887cd9d54329118ea57b81aedfbe0202fae1feb240ffb929f713c6d22e85fb2. 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/COUM70600080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db15c866249b8ee7ba877214df5f05e40997010116b0f0e628f2b499e1219b9. 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/COUM70600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd73ad345a561931946547ca7e8fe9330969ba546018234e1d0d696aeb814a2. 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/COUM70600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54652ef9306d16209755980ecc9f3de7d2a5d98273ba1caf1de24f9c08899ab. 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/TCACA1417046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14442784fcf19308ed71d51d22b47e4f17bd6891fe04f9fe54d9064fb62f65d5. 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/TCACA1417047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c48ad0bc706d159e30701858692be53bcf95979240a3260bbc43b1a98a6169. 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/TCACA1417048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae32b704bf22e2084e2931120c3b55895b59dbcadd96f4408da961c8b0576e9. 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/TCACA1417049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9070da85f2a8586492695ee7f6bd075c76ca8dbf755d42ee09bad1c65f889d6. 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/TCACA1417050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5d69c3d1f483e604561ab23693b93f2714d9024d169905aa641497af16498. 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/COC012440933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3b52f779e457281db16230e281874acb72b97ffa5ce9ddf0cc50b61a5c89f. 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/QMDA62188735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f928e8ffb5918b1da8ebfbba00d306ab7bc73e0c239b8e95197c0d0d649393d. 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/TCADN1866482.