Cole Swensen (born 1955) is an American poet, translator, editor, copywriter, and professor. Swensen was awarded a 2006 Guggenheim Fellowship and is the author of more than ten poetry collections and
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 0xa76ecaa153ba82eea3dff773e5775cbe9eb30b173c2c1ae253109357f3c41741. 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/d2830f51-c2a5-466b-92a0-83fbfaa01e99.json and https://artists.proofprofile.net/proofs/artist/d2830f51-c2a5-466b-92a0-83fbfaa01e99.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 0x3031d274850709f309f1b294dd45944034ca526984c0a2fb2854c7f5be7275ef. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZK6J2212775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399af3a56cfe492a4031941c5c34af81bc5fd4001d8c60ef255d9f426e2ad651. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM24S2203654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01dacb29d2ef6fbfb5e37a8c39bfc9965188c800faadab69dd85e19cd08cf8c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM24S2205442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde9212f0a3f87ce3de207bad615123ef9728fdb099b155ee8978837670bc81. 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/QM24S2204035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cd1fa41198a4de20eb4ff512cf244ed96b49deec1cfb6a2a8a75754466f5fe. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM24S2305589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc50821197980b3f1d1877afdac02bafc06737a5f202dc73bd5006f5a4ce9ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2406187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d46c94a95ad3cfb82e3f47ab7b2792525de3c5489bf7c27228d9b3ff5c391fc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM24S2407017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f7a218cf08c12fd373220830447ebef0a2d26963b099b1d1c911f78ba7003e. 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/QM24S2500679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d272e565ed3f604e4561d0dd4f469dbd25806a000c50fee8d52c656c108cc. 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/QM24S2503810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44484533f031727fd5f492c5e51bfa0bdc0befda01af36dd60ffe4b72c22d522. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM24S2503809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba2cfb81056fb7c70ac102fce3c65b8c037440aa4bd591318b33ce50ef26de1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM24S2503605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c42663d4c77f818ffc1d1aa4eb81e61dce1ba07185f9a89f93ac79c02f82b. 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/QM24S2503808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df2289ab4430595d7a30fa3ef9695e43e81950681ea739a0379abc417d5618. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM24S2404248.