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 0x63b3f94cb8d338b4286eefccf4a5bea131d837bba1df791f0b6e2286406e9477. 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/9b461094-433e-470d-8c31-c185f03e441f.json and https://artists.proofprofile.net/proofs/artist/9b461094-433e-470d-8c31-c185f03e441f.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 0x71e49882064cbe83a3394982664ada6231d8a5cb9931b3e7c949534cb008254c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZ7J21700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68c6a1f932b8d2cdd3db83d42e464cf6cc3b2697a83bd62f85699b1509bbfcc. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZ7J21700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe271009eb74fb4e63ebf0480a7387cf55b5343910d9a8ef87a2da3f46ce4b08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ7J21700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4928e67f3417ef2dd2795897b606f272a0528f4b52f626026133927bb5aab91f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAEE1953855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45da83ca5d774582aa928b0781fe860a28a5ce78ebac9cba2b70e6c9165769. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZ8K81900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3e8866d8302ddc5a5011f25115aad731f9f4e121b4b08a755e8f87b358baef. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZ8K81900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf557b739830ebad03dfb42573494f576ecc0b523cc07db21696b583dd7d2c267. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZ8K81900011.
Santa Ain't Coming to Town (He's Drinking This Year)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1b918fb852c0eb8941bcead21e2faf20339db8580ea7af4875f6e226f4fd4. 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/TCAFP2142504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e017bd1b58428dd70377b1a83269c20c647337e9d620d9ccc08f00cfce91e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAFP2142509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64fc5e82888705eebd36d27736415370e0ea8a9eb119beed6f9d2f4b4c6508. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFP2142511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17073e0bb580fbff058341c929d18915384679538f43684938621b943a91589. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFP2142517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9957dc39524a586bcf3c923a1ef88db3bcec17648b860bb433e1e88e35e913. 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/QZJ842402635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9957dc39524a586bcf3c923a1ef88db3bcec17648b860bb433e1e88e35e913. 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/QZJ842402635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d3dcf01333a548eaecb788f48af12747f7388c5847b837eedb4475df7be1e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJ842403337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79861e3567277ab7576d3e3a74aca183367022f8a5490277f0a24efabb0b48ca. 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/QZJ842404447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a9bfe0aa7506cce075fbbd63f9debe7b2bf892d5f99c01fa32f686d4a0b239. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZJ842501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4822c283e2b25e011851977df87c5dc3a9c4a926f847a5259484a20755403e89. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZJ842501277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102da21c60565897044664aa2a5e1ec27aaabc966d6e9e85f89fdd7298cb32aa. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZJ842501278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb01d273d128bccf9dc8ce6eb341fab390f8fad06856d5a9e3c440eeed17de6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJ842501279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f56e372984c1d98e29441ba27a98f844bf022fe5c37ca43b4b86d65f8ecbb. 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/QZJ842501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd63f4f6adcffa892e1fb4eca3bb36fb09e3cb58d03785078c282d3d08aa277. 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/QZJ842500958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba46821eaba7f6e6e89265eba26816fc4637c85a81dd7570871a988c7f669eab. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZJ842500959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f9a5aedb069c52d17c725d54faaab98685729ab29781abc57585a02c75828. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZJ842500960.