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 0x5615b3ef020a8e0b3cc9b8b8d9d7f8825a8e627c14619655d117d6d5cdabcad0. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6e053df-a884-43a0-9df3-6e0b0f9d95ed.json and https://artists.proofprofile.net/proofs/artist/c6e053df-a884-43a0-9df3-6e0b0f9d95ed.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 0x7bae04d077814bbec6aa50446854bc145942e6481772693a153fbf4c1646605b. 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/UYS261900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35de4629f6da8d8e87d0530d011845ad27a482197455fabe3dfa49fcc24cd2e. 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/UYS261900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4567ce2cf165f04608a7d8b4e74e33000080aac001d326efe70ca7bf7967c899. 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/UYS261900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63954f5d5db77b5f0e718de8724534953891e8e9fb0c399909c2282f98630ca7. 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/UYS261900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f649b5684cf1845bd243348f3f6f9dde89f03f4b3a0083a722a4b3f43b2c83. 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/UYS261900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2da98480aaa0ff0fb5bd56600604321b992a6ebad4309ad9e00ca3518bdb5a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:50:02Z), 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/UYS261900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6930c5c719211998b79d9e409d64ce235cedb63e942080bdc35e254c15f4d43. 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/UYS261900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe008d644ca048093879ab2b041486e5ec0c73b404d524e46dde88603b3082. 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/UYS261900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6ce51f4fb6da7c11a3a2df7f89f19e89e0959aee0ea8efbf4b933610b77d4. 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/UYS261900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986e87a695d0d066e4c76d819ace6ebf48e83aac9d69e8dcdee4a3e78473fd6. 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/UYB262000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dca45fd3d7fbca336b1d2e1b0c288eb3026b0911b4137f1f6f4dcb2d8addbf. 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/UYB262000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39566e510cf0145c84a179f8c8399b52da99c47e14b599841022365e9430a452. 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/UYB262000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713b48c19c681307da09c2b275ac1991e35535e5e85be1eaf0397a2f721c053a. 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/UYB262000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c447b3615c237757d0ec859c9a803c4f105f9b71a5d2aca2858e15b18386890. 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/UYB262000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986e87a695d0d066e4c76d819ace6ebf48e83aac9d69e8dcdee4a3e78473fd6. 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/UYB262000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39566e510cf0145c84a179f8c8399b52da99c47e14b599841022365e9430a452. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UYB262000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddcf5b9eecea906b70f6dba8f4380d5fef2fbe53cd535c2c80dd1864f779364. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UYB262300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717d50f95a3540bdeb095a63e848c6baf9d7f03d401a463630a1a73608e6080a. 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/UYB262300050.