thumb|upright=1.18|Fifteen candles on Tenebrae hearse - Antoni Gaudí - Sagrada Família. The candles are extinguished one by one during the course of the service. Tenebrae (—Latin for 'darkness') is a
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 0x9dfd032073a9a52dd6c0ff47d6450f3fe0af5ab1a5414025e08e3909d0475baf. 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/bb1092da-2be1-45bb-bf95-ff70b2535804.json and https://artists.proofprofile.net/proofs/artist/bb1092da-2be1-45bb-bf95-ff70b2535804.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tomás Luis De Victoria: Tenebrae Responsories
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 0xc459dcafddff78a0ce6d45844cd3f591ce61936b95a0562016d3452e27f46a41. 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/GBLLH0608501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720832d452ef387e69e3f9d1b47c70be16392056b9ea7d819320ebdca86c64d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLLH0608502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529dd837d3f386349ef357ee80642d656259a883797fce42924d752f44554ff3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLH0608503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea7719e8bbc438c21fa7b3d1242218ce53e1f142d77e456d378d9d2adfca2f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH0608504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5930c2c395f540cceca36045291d60da0da7b5141488e693a0ab9b579b965. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH0608505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cec3b849f846d23786aab9d12cac285faab20564e6f133077a3d9c9085c35c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH0608506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a947ffb6a2a5723b31a20058e19e53a3c70eeb4646eb4992793a4fa9d651cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLH0608507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4ef53d152f7aae82f625658e1312f0d8f0175d0b6e14a1feae16dcd310ccbb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLH0608508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36258ec5e6adfe174283490fcabe02007bab43beed7956aef68b08f7246b5e. 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/GBLLH0608509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54d2f761cbfe99165a92578acb550060445c67c3bbd46f4d83c9a56cc56003. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLH0608510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2b3f788f9d92c1f227ef1c5a2a780fd2c26edc81f68ae781459fca0c94bae1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH0608511.
Psalm 148, Lord who has made us for Thine own
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83684414d7b88a90ef8158e569d7e5a3541af5c0dd2af9653615cc350391ec34. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLLH0608512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7699ff470be62aa01a349ecea12a24a2391aac95b4b6af3aea443bd065e82f1. 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/GBLLH0608513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a8c97ec4c9c6e024bb08287ea394876a7f166929058765b0d34f8e2739599. 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/USA561326635.
Stella Natalis: IV. Only Heavenly Music (In Memoriam Christine Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a7b858d649b22e8d4a59c8fe1825e5b978dbfbd33028fc62c5a72911de6e77. 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/GBAYC0902275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218412380fd39513864decefdddeb95d3b46d015a161c2bff0b222fc89249fbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC0902280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe1b9476e0461f6ef6e22e2e53383f907b5c01b42c3bcae86fa3ef21e255690. 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/GBF071504100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70a90751e1497701f234575fe3d1728f13e6788364eafc8f54b44704b17304. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC0902273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958ab7dbfa75d7d6717488644b54bfbdd27e7ed8198d5bcb7070f75eae0ad853. 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/GBUM71201536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea53552c873a115da1d70611f73d98d6e45782ab90fae117885a0dc35f0a20. 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/GBF071504150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73039d9f8b97d161ddd02bc8fa1c08eae68b1b26761d04bf0236af8fabceb75. 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/GBUM71106770.