The Swedish Chamber Choir (earlier known as Simon Phipps Vocal Ensemble) is a Swedish mixed choir based in Gothenburg. The choir was formed in 1997 and has been led by British conductor Simon Phipps s
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 0xa33f73f53b8d681c3b57a3d2112c78eef4547b067752dccad1a3236d7ad8b896. 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/bd7d6e5b-9b5a-4252-aafe-474b71a5697c.json and https://artists.proofprofile.net/proofs/artist/bd7d6e5b-9b5a-4252-aafe-474b71a5697c.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 0x68a6d0f126793596af409b8221258b71a59af19a5905d2d693b28b8e0dc22eef. 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/GBLWD1904801.
Three Shakespeare Songs: I. Full Fathom Five
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7527c970ebbcef1b27d42d5c25afe30bbe2ee5b0e79b041622d48b437945510e. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/GBLWD1904802.
Three Shakespeare Songs: II. The Cloud-capp'd Towers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c7e141c377b7f37af8780f18bd6a6acd4c42fd8626d9c20766d7b12976b82d. 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/GBLWD1904803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85adc89d6d5e6bdb6db5a582da27fa77510b65682b1a30124d1d52c392d14b. 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/GBLWD1904805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1567ad739f57df9216e25721bb9b2558add451b520a8661ea223ff9971a0209. 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/GBLWD1904806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee1278de297794726488ffd5036591adc05c4e7e606b910ca29414bbce1e939. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLWD1904807.
Three Choral Songs: III. Had I, O Had I a Daughter's Son, O yea!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8185ea3bbc2238e48a7702442bba4366aa88e97a25fd6dacbc02ee09a565a0. 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/GBLWD1904810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fdaccf207bba044db1f763fb0f3c3c68d735ac3933ceab145f8baa7a03fd2a. 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/GBLWD1904811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebfb8236f7d81bbf45d6a3f2c6dccb8ef5e364903e07839eb5024af51684a80. 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/GBLWD1904814.
Three Shakespeare Songs: III. Over Hill. Over Dale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852e344e2c3ebdbaa97561a957b900f9cb130779ff1550d3acd9ccad95d94a73. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLWD1904804.
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 0x7fad3a673ce4cc2f1a902342668f1781fad44f72029502bb1b0a19c67db0cd33. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBLWD1904808.
Three Choral Songs: II. In the Seraglio's Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd9913398388c52de676744d6aa29457cbc5f6eab00dc15a748b6e430a388f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLWD1904809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bff87769d15a911bb4124d84721dd69a45fff8b9994fa7745f874eacfddc683. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBLWD1904812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb629b61a4cef90e5695f8730f6b579776c2ff351a123b07f292cd602f839393b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLWD1904813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a1913553ffc23ead927be1d6392d35ee866c9adf42f7c4cf249b368143d7c3. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBLWD1904815.