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 0x816cfe37eb524878303a4e2a46f514386a6c4804e82fad1deef1f44b030c3bba. 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/b83179dc-b8af-4f62-a0b6-90ec30b0ad73.json and https://artists.proofprofile.net/proofs/artist/b83179dc-b8af-4f62-a0b6-90ec30b0ad73.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 0x843ae23930de83b88a9c5fa0ae6d360d0b89a908a8b72258f229eac6e23bb699. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADU1870037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a8b18c469acb080906f294db63178fd87e7959fd308e378d5693d4484700b. 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/TCAEM1968468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ef40293e0d77f6ce2ceb36f5e258d2055db060f5da68821d2af893c76c1e0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAEU2085756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1dc7d20cde8fc0778fb5e829f3d8e8acd99b9b175e626b6d686c7311cd5b6. 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/TCAFY2168087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0642037f2ebe841f78a73f9bd137ff46af5301c95686ee87573920a25279f15. 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/TCAFY2168109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6602ffe5b2947a302827b3b7ecedc8453b296b99ecfd2b1568c9b2b3b2cca56c. 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/TCAFY2168118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9845dc0dc887dd8d224cb0982a4a217c2457114b0d40fe138ecbe4d596a7373. 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/TCAFY2168131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd06c4ad037dcc03c409cc832923bcf13b2e308fe6f789b31513da3d6a8cedc. 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/TCAFY2168146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820ab530a4935fbc42d374d0a4f07e474d54bedfa1d8d53880ea579680812df2. 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/TCAFY2168150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb484b1d4d326215b9667cd31eabb834ba28a8a1a44e6b6ca873fe2c8d0f94acc. 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/TCAFY2168155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c2f3776bdc4222da64c8058ef0a224fd44b13c00c9c4f440c6959f3cabc1a. 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/TCAFY2168170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777f6c0b227a1595682201ad417a05fb5adf8414c01a6e6727dc77eb0515344. 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/TCAFY2168181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666dfc630e700c01bc40b66964de3432a5c4cad0f0522b2f6c8f2807da2ba45. 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/TCAFY2168186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f28bfdb214d1da4f9d6282b26a8e0de8d8bdbcaf87136449416223b2bf296e. 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/TCAFY2168191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d06044a0959891c07822c82ffd0d04ea17e7e2a6467b70f7dd86c0ea7361db. 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/TCAFY2168199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349d90a30cee62cd2be66295fb9039be24b0f06af5f437da3733a97ccc70d2d. 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/TCAFY2168202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a978f094aa3137c44595e487e7aec1d876d5902336789531a68ddc62000cfd1. 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/MYPI11200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b3e8aadb1418175759677ae25ac13342a3d918b88da8b6afb4e882948ff4c. 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/TCAGI2280885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e481e568779b120973a0ec6ffaa9e24497993f9f7d25d31755d70d6b345dbd1. 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/TCADZ1867530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c73b327d545a9d405233b4561a9cbd275c1ee7ac33669149b15a9dfe2c8ff. 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/TCAEA1965910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d95c7e31582f56d2b6a71ea46c71f6abb080b43e50ff08c85a27caab0c54c1. 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/QM4TX1886704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b47affecafa7b048a18109938e584ec9d08aff8e20ad4ea5a7689ab3976c64. 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/TCAEM1936811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe312b81b95ea16fdc9c7070e0e59d4bc8f022b751a44ff53c39445b3b896439f. 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/TCACU1694941.