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 0xa606ef6d7e9b354414eb562b970b4ca8f6aeba9c8c9e47269ef4db18804905ad. 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/f8301fab-7da2-4ee2-ab7a-b54fb79a58e3.json and https://artists.proofprofile.net/proofs/artist/f8301fab-7da2-4ee2-ab7a-b54fb79a58e3.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 0x3f93de8e7d4d4176d6f9e70e08ab98bfc06b4061de0476567d19932be8d1a6b3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:09:15Z), 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/SE5Q52000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688d57dbe3b60935a473dc65f12883b4d60e4f1beba397e853f5fb873273c0fb. 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/SE5Q52000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7124883601e31685216ec1c33ccce84ea74108a693d385664cb01c2b072ad75d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5Q52003438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d6bffea24313152faf85380e2b53e1319ea16a7fc979d0431f5828159ac9e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE5Q52003786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b87f7adda0732a49d3170e52589e81d704a558aed097a64e5d2926bc04cb0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5Q52002732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea614f4de6756e156adc310a6f7bdfc05a60520348320570240bf014ffaba5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5Q52001053.
All Good (Theme Song from "Amber Brown")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47fbf5b4c9bd09c611f325a834a75309973455527ad59d77424da0362645ca9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZS7J2280712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a13757325d697d53cad66ed211b2f4037e45ef2f0e1148beaa3e66cb4145466. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZS7J2204402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47fbf5b4c9bd09c611f325a834a75309973455527ad59d77424da0362645ca9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:31Z), 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/QZS7J2280712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a13757325d697d53cad66ed211b2f4037e45ef2f0e1148beaa3e66cb4145466. 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/QZS7J2204402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185413a390caf9f141d8777e392c9e7cc1a14590a741d8b1a391031a9b99747a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZS7J2443546.
Homicidha (feat. Revel Day, Billy Kent & Alkhol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38bd639ff30fa4bed9023e6862ded8e8f3dc426c830e46d1cd2578e04ea781a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF011400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa95bf39c133129b8f60d69636daab0965ccb4e6a995584ffd6ea3dc8351c8. 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/USCGH1984777.
Epidemic Presents: Crates (Gouken Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38137229b46f718e4ad3375932956a12b69fc4b63100cec2e8f113054175013f. 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/SE5Q51903980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331bb3ec27102eda2be1af91b225f8ee394876cc26401c4ce93c249c246c591e. 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/SE5Q52001023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8337fca299c8c3548bcbc3a7f50aa1a71e0e8338e35efff3a4be10ce767f2c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51902938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331bb3ec27102eda2be1af91b225f8ee394876cc26401c4ce93c249c246c591e. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:41:23Z), 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/SE5Q52001023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354356211bf2d788039d6c3c986f878c01b1cb80f6d02faab750ba8fad2f1028. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5Q51903953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449b520859aae5b3c04204090256c1db30561a65acda43ee53d8eb973a409e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51903058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8337fca299c8c3548bcbc3a7f50aa1a71e0e8338e35efff3a4be10ce767f2c4. 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/SE5Q51902938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f18c5718b33565f45f617fd6a4448b86f78a29d475c9dd51d0e4fba0252e1. 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/SE5Q51903764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001f424cec08a4d97a5034605ec5c6e4c1ce0a178e10289bdf79a7638c57c17. 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/SE5Q51903259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b96db1db4d3a1ecebb37d469b1cf454d68239578480938e8fc581ca3996dc1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE5Q52003436.
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 0xfd871bde1a61926367b9d6c99e6f88ae3160149bb4fd781d1869863eab87187c. 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/SE5Q52000163.