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 0x5f828425262ed1271e31b076a4878b49f9107d83af4756ac5518d9177f558666. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0303186-869f-4b54-9887-0f59715a6b58.json and https://artists.proofprofile.net/proofs/artist/f0303186-869f-4b54-9887-0f59715a6b58.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 0x367df376c5fdae5becbe2e4433f897fa34e33bba974fd5dd1a4093ab8a6bec8a. 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/QZDA41928419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9120c62843341024a0d38fde925c56f03c9104099265df95e63a6adcce0f49a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZAKB2002123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaeacd2024ae026527d811bb2aa7f32e254f4d508611214217f4873849677eb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZAKB2002124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5000d929bcd2f74ed1814f2a5f05a4b6829e014ea04b811f4ace71a80ae06b6a. 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/QZAKB2002126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946d3ea3fb1f2c859239c25bea99f8f13c9d7065363bbe623df22be9a085500. 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/FR59R2265779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4451d9a4876a2b7c7add551df64902f638956d1478409f1b64e8cd2ab0353. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/DGA062270763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e84c3d003668fb81f3b3ce95e0dd121a41c2bcb6bd0d0bf58e24a7bcae7568. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM3DF2275641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13384dd7ba9d940d0840bfcce69053f185d59e107e9a6116bd68dfe2b94379d5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM3DF2275671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fefcc65860b1267b7957bce5122307de7ec7c8c56e0682d7cc5db833c9896b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM3DF2275653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae5178b06a41a0f15196513206f21cbb4b58b53552f5101ddd48d1bf610431e. 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/QM3DF2275654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8bd0cd3f7e0a6f0ac56a9bb41ab24456c16fafe1fb789af8737f079340b0da. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM3DF2275655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000affc07be25f61607c64d88595d667b3979f126e6134a422f77542cf937154. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2275656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93983f299a7e42f2db33a42db75b6f9462439cc2cf9607e4baf2359bf3f2568a. 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/QM3DF2275657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a865f13ef64e60223c0d5f1333a841144e5ddbc2775697aa30d45bf469b2b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM3DF2275658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d27959157eb4b71d6b6e26cf937afa82a3a31c9f34957e36dd87743fbd911bb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3DF2275661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f098586bc20dce5fcfcc54261f78446cb7eb3658b6b73fe42dabf6656d72e78. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM3DF2275664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91f6586de88b285dfc9174df2b56065f83dd2a6f0a7663d192402a8e2b717b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM3DF2275663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0588aaba9506a4c7c4d372df45f4ee91d433788844d7454639e24305ebfd11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2278714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35c18a451a1e4d5faf45c89ac5a16221fd8f5616d9e9cfaa74dd565ea1cca93. 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/QM3DF2275670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e84c3d003668fb81f3b3ce95e0dd121a41c2bcb6bd0d0bf58e24a7bcae7568. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM3DF2275641.