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 0xc062f7b29805b2287367d6ee086159fcfbc6ede5e6ff5f3816b437f271520b54. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b35676f3-e340-4f9c-ba49-a7e9135c8498.json and https://artists.proofprofile.net/proofs/artist/b35676f3-e340-4f9c-ba49-a7e9135c8498.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 0xa7502000a219f0ba6ca36270d847afde296412f23ecd4204463b97e0e52346e1. 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/DEPI82432200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a457502b216424059ab9ebb99f94e374fd325ee30410d4ca1ceb6420341ef4. 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/DEPI82432204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3ad2cc968ec2fcbff1cf7c28056c1a95e7561eccbcefe4d553d91e2bb3d4fd. 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/DEPI82432206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939ba38f05a21e74e7a23baea6169ed79f7137dbdd74346749dee2bcb3fae4e4. 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/DEPI82432208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd491f269390e60f89ffb1717aa6572bed33c5ada3c77c1f6ed087c3030797. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEPI82432201.
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 0xfeaa9b99e71b3c55940c61c24a22d616d1b8b9ab2cdfe7961887f5c77c18cf70. 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/DEPI82432202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3fae93f2c3d14621a2d2d289eedb1cdfac55878ea5c80cfac957b9dccf1e1b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEPI82432203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb10c2085c69f1478a87f25e0485e513fa5ca26d7db57356995ff9980ac46b5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82432205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545449dc86184971f4d79daef56a00651623cbfffc1dc2e82a8137534e3b213a. 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/DEPI82432207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a63cf95821aac97e444898f4f580f7914c72c3b17d15b46652833f2b7d80af2. 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/USY252142799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b62136789a140d7cebde9a49b0ee11f12cb277c31e371e0c082da67774c65ae. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USY252142795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2140fb71add5f0d53d31e7aab78add97a780b3a4c4ded47fd5a6a73142d4372. 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/USY252142796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedce6b55796fb6b82466933cadab2cdf096e52244b0a1137ee11167a224e539. 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/USY252142797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac9a76ab16b17c5d29b5844f8b41a3bcb092beeb04292df4cff9a2bb482b8f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USY252142798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183991715f23f1d52830a0c991e083e4dd4a3fbf4b256b8c02a1fda417bb4e51. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USY252142800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd122f46e21f44317fdf9ecbf0f05c3d66892da030191247b58af670b485e6d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USY252142801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0303297f4686fb1e61d4c21c6b7fe08b2744aa77875344e2466aa668b7d61c97. 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/USY251976762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6e3f9de8a260fba9b12e703503c427fb2b9860ef98caa881a6d5167c4022c6. 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/USY251976764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ef09ba8fca5c83cf6a16b348c9680586b56232a590f52f384fa46e8018263. 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/USY251976765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b7670d562009495c2b053091c9581080c82e7371097256998824e4d1931f4. 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/USY251976768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03ddf22a7f9851dc739d1f6b51f8c0d7e0ad64aa3aca01b7f8d033407c8d7b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY251976761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d26ac1542230f5d973e66fd707e11bdbe9eee59276c66336a18ba2953cf85e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USY251976763.