Constantinople: Music of the Middle Ages and of the Renaissance
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 0x99ab560aa7f40ffb73d63dc0ad304c055a2e140bea6bef7252c4f5cbc94a2cc1. 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/CAJ720126901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13233e020bc46fecc830412f68d2646851b9f9f34f92107e28c25af3a77523be. 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/CAJ720126902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1a04a31c998ab57a6aca1bba3b1e9801be88e8b865317981f4709f6132e6c. 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/CAJ720126903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8a7a05132eb1de031fb99d64bbc2a4f9e3e2876586e7a61a600e1124bd55d. 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/CAJ720126904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4421b7938b437e3258191aef8ec40d013b2a32d71f2c35358b6e704c25ce38. 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/CAJ720126905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f10273c1b9ebef39114f846ddf6429ab70edb7f286070605d8d4dd3c8b39c9f. 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/CAJ720126906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e5ae38773837525d5cced362caeb7caf0fe37513eff69495612b667a3b99b. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/CAJ720126907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa7d6180015da675da04f39ac72253f2bfa2389c74eacfd0ae92365147e30bb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CAJ720126908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32497c000d43221daaec979bd781cacf91e2e962b2277c331081db83884b66fa. 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/CAJ720126909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47e22f21c3ec803f5339bdb3520734d8e01ed2844d1ddd47d6762b4324cda5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CAJ720126910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5700a06f94704e134444d38ad02d1db6a037df3b9cd187319c1d5efbb7e03a0. 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/CAJ720126912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594a9fd49045c27346ea7e5d8ca8028a0141e2a35744d361caabd2eb9780dcd4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CAJ720126913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a31e1bca59b57b7b469b5e12d2157dd9e63331294ffd63505ee3411c7d14673. 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/CAJ720126915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755c91aa1b0613a5d483c2ce57084b8bbf756b9c3bd9a5364d1cdb4e6cc3da57. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CAJ720126916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75686f6cf2067bf42fea8b283025a2bd4ccce0fa82d100bda1a0593d72e736ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAJ720126918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe544c7736ac769d68c1f8bfb1cdbdf3de4176a4865566dbe58d0460f8f5ece9e. 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/CAJ720126920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b2d496cf6d8a58dc219ce93d5ef58e12ae73bba8a6592d12998f5799513f0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CAJ720126922.