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 0x023d567b41b2fadaef11cab79f555bf3e88b79f16c66ff08c115355a3bc21cf0. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9176ba25-8006-4de3-a095-d66cd801b3ec.json and https://artists.proofprofile.net/proofs/artist/9176ba25-8006-4de3-a095-d66cd801b3ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Another Girl (Arr. for baroque orchestra and saxophone)
Golden Slumbers (Arr. for Cello and Orchestra)
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 0x099adb6eccb859ee85cca41dd04230811cd7e3126ae8471b29156b04a1cd748e. 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/DEE472400336.
Greensleeves / Norwegian Wood (Arr. for Baroque Ensemble by Bo Wiget)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfda7d3dc4938b25ecf39e9b0b5d7b5df5eb14bc1403f58ef59d08f04d1fc58. 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/DEE472400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8107ae463f1f69b5281914437730efa835c5d4f3fc31c6bf4393e08a14cae8c6. 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/DEE472100107.
Because (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6876c232c47e1fbe95c1056d4cff37bdc4ff769b973b60a535ecb294c61fdcda. 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/DEE472100111.
Being for the Benefit of Mr. Kite (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f01a8e9bdbafc1a6793dd239ae6fc36863d5091b3c2e4b65aaa3006ad9b8d78. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/DEE472100113.
Yesterday (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fbb9a70091eabf16bb13c7d922c65620bde098087cf40e7d330fe58a45591c. 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/DEE472100115.
Blackbird (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a274a7f46f3b6a9ff412f8a4487ea3a1865db36fe718367eb5937d406293b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEE472100118.
Norwegian Wood / Greensleeves (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b660edf040fc1bb2b05c31ed12bfc274427d6d2fc76219b5822428e03a0db4a. 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/DEE472100121.
Tomorrow Never Knows (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1901434b8c0865c03ba281bd508e96b4834af73a07b3e16d7db12a39a9113f6. 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/DEE472100124.
Girl (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd434f005b7246deef1bc8d1e675b7e51be88b73c1567d7074f7d6b21789b2fa. 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/DEE472100129.
When I'm 64 (Arr. for baroque orchestra and saxophone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881942d54e43fa660a981b64de501c2d60b5673de5760a8f62e0cbd2eb1a89aa. 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/DEE472100133.