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 0x5aa7782475fee13130a6320f06a1a1105e42064a52d80a697c31c2436869d0d1. 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/4828bd3e-37b2-426f-80b4-de1e4f9d66f3.json and https://artists.proofprofile.net/proofs/artist/4828bd3e-37b2-426f-80b4-de1e4f9d66f3.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 0x5b13212d4242b38f0adf6213eb63c029039d39f4da850f9b3bd74e4ae093223d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UYS059400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ecc88f8eed76fb631342c6978a9badbd1e772a77cead3c476d4cf6e1a07387. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UYS059800380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea67f69edeed79d3f641294fce265becd02d666ed886bdddcc23c485b28fb30. 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/UYS059600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd0f452387b7711c11c1cf50f1c4cf0a3b084679a60049d0b8eb1a80aa47c97. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:04:00Z), 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/UYS051701133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a71b95a3b91379a2e95ff07f3a62db8c53c7c2796663a7aabd9543d4f74326d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UYS059600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1f487c3d27d1c701a731abe8f947c4c8d057f51e3581feaae6d6a07b7046c3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYS059600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4365ab90f982bfcd08dc5b4fa60dd54d6d2cac6c9e1c355397385c6d1a625669. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UYS059500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d88145244abbb74656e120507259ebeff00ec791437720e0e01de277d5d77. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYS059500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380271ecde9f8394caccc5677960b8677660ea08a1ad24c58c6408dca5147ac9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYS059500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc50a42c834f92d0f897cb740191c2f2da8aebf6e5e635cb18e5dd2761ba4c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UYS059500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790fe2742da4c16380737e71b4262d9af92d42cb831d6066450fb65455646029. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UYS059600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6fd19988d0af8a402b83ca9f89ad0def9fb57c209827c35e3d5595052255c6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:16Z), 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/UYS059500271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcc958202c086ab062dc7faa0eeb7b5b9a29f84782aa8d3a6f4bf433c004135. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UYS059100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d05eb7e1e29a9ee0c0bea247c353edae507703a22181f0e51573613fdc9d58. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UYS059300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c3ef641f3e2f3e7fb824c3f7fcfe69f745e6f4d286b335e4573faa34231b8. 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/UYS059600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380271ecde9f8394caccc5677960b8677660ea08a1ad24c58c6408dca5147ac9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UYS059500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dd79e2d72f4e58a454bee42956d9ad997007340fe0fd34c56b197174479e1e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:29:15Z), 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/UYS059300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7363bfc65688fbb7c804b89d53f959826c48e6767e31495d891d6ba74595f234. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:26Z), 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/UYS059700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44350670e93aa09d96b38d564fbccb44e71e14907db2c16d2304e8d047fddd53. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:21Z), 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/UYM122003058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d817d4956eaa6293601d733c6696a58e067b76fab308b6d814f9ce9593207e. 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/UYM122003042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbd8d3b99059c4d56fadd33d1c3324262368247dd00c0446cdc85fcf308ebc1. 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/UYM122003043.