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 0xd5ca6c17dfefa942141ce9a3c59739e0a3e6946e75b16d2823241921ab129b52. 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/0d83e1c6-3987-4f8a-9da5-047558bd0a21.json and https://artists.proofprofile.net/proofs/artist/0d83e1c6-3987-4f8a-9da5-047558bd0a21.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 0x014fe72fc4c2007b63ceaff9d570e4440e2804eafafa06a8e27381ae39a44f76. 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/GBP2K1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646cddd82be550c38b42d512a7f2c0dfa2e4e8beba013e2836336c0d21ce362a. 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/GBP2K1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b3dea2d0ef1408d1c65794e7b6fa39290c8ef52464f2cfa35700395f18a30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBP2K1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6de99a1f7c41145a0f266f687a640081e7352c5d5c119d37eebb0569bb3a2f2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GBP2K1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3778c42ec325b034684b403f8dbc3988827ca8c688e7f481fc420da2d595f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBP2K1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50bbba0c5c0052735536eec8cea6e437e5c16d921905785fb3b133d1b479bf7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBP2K1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ca11ca3d3e66ecfbd28dfaecfbffa3ae36ec7e4cfb8a3ed5fbbfc9f053c39. 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/GBP2K1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1110b83a4025009aee2bfec650eff598ba31c3cb05c7642d97db4904a98b6a8f. 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/GBP2K1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7292a191a6ac5c95e443260ab1177116359bd25e8c5d9bf6e2d52a11d2c7217. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBP2K1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd15dcc37aed4d4750df9eaf2a6cdba297d2432f78c5b7ddc3e21302f2bed79. 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/GBP2K1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68f446bbf8da30908fb310451c91011c5d5ffded17426a7c5bd3a07fd8c0d52. 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/GBP2K2200016.
A Blues Tribute to Creedence Clearwater Revival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70331e339de7341fbdd53b66c4c22299a5cf517304a8a3447700d3d96ead9e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFMG1451964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa93cfca788a82fa5eb20e707bee8ae4cc5b1efb3ff7db35049ef3962b3fdd1. 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/DEFR12400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1121d5a450e1e4d5ab1362d7db8b41bf56771b6231a162869bd2b1753d3e62. 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/QM7282010643.
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