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 0xab04fcafc92e3e1bdc0115481c3750012a53f94ea0c04bf13d8a1dfff10b3666. 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/862acd2c-c26b-40b0-a11a-cea1b95097b4.json and https://artists.proofprofile.net/proofs/artist/862acd2c-c26b-40b0-a11a-cea1b95097b4.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 0xa4ae546b3f6da36c96b7e1f9f9f9e3aba54a9cb4f15ae3137e908b16e276c179. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBWZD1810803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b067e10a41adf895122454294105ee0443345915b1a7941b9cc9adb0dea949. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBWZD2215202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa53fc372caba4f294a3a803a8b0902da6132ecc149f928513226136166154. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBWZD2215203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d76570762335dae78ef9be22a9c78db339457959012675f9f670aa60f91220. 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/GBWZD2215206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013332a7524807c9d36e1e7a2c35920513b79091897d5f7de43c30013d7e7cf. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/GBWZD2215207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e44d6ea60932cbd211d3648111e20109fc262baf65d27bca354ca19015129. 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/GBWZD2316201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e3634b5b20deade7c3cb544e819ff58b750a61f6ea15689a09445171d42c1. 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/GBWZD2316203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9956ec49819e5f57fdb14c43fe1db6b16cd9ab789c61280008ceccc11ef36177. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBWZD2416201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d5cb01b9a925a34a276707c574fefc16c150c70072cbc0ad3051b4e5739dc. 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/GBWZD2416207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9956ec49819e5f57fdb14c43fe1db6b16cd9ab789c61280008ceccc11ef36177. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:26Z), 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/GBWZD2416201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e62409be34a49b66e433fb42b97c2dd42195ae0c4050c32d9070062e53005c4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBWZD2316202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ff0f057f001593b5c7d65035acc58b4e29fc39e29a7a54e04d522c833bd8d6. 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/GBWZD2416208.
For the Birds: The Birdsong Project, Vol. I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35fca0bf8f550ae336b0df7e14a46d10206d9636752703a6fd496875a8852a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX2274373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec9d364e734f52a5839fc39c38045213a9d353547d290780efd3f9e166db12. 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/GBWZD1810014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0da4793224755c7253d81730fd6826916dfaaa21716a8174371af675b22105f. 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/GBWZD2215014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350c305e15c0d03214bfb2e2edff9105f59777be82803cafb6c186f06fefe226. 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/GBWZD2417006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b11626dbab4d97deb1ddcdfdd121c52c578b852234f707a34bcb0efc9e14e56. 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/GBWZD2215005.
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 0xdc1c9c20f81437d392e30ba90652987b13c9f7c0c2d62be4fa15d02b9fc2bfc5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBWZD2417007.